Conversion Charts

Standard/Metric Conversion Charts

Conversion from Ft/LBS to Meter/Kilograms

The chart below can be used to convert foot/pounds to meter/kilograms. The foot/pound column at the left increases in 10 ft/lb increments from 0 to 110 ft/lbs For each additional ft/lb, read the top row of numbers. Example: If you desire 45 ft/lbs, you would look to the number 40 in the left column and the number 5 in the top row. The conversion to meter/kilograms would be 6.22 m/kgs. For your use, the conversion formula is: FT LBS x .1383=METER/KILOGRAMS

Ft./Lbs.	0	1	2	3	4	5	6	7	8	9
Ft./Lbs.	M/kgs	M/kgs	M/kgs	M/kgs	M/kgs	M/kgs	M/kgs	M/kgs	M/kgs	M/kgs
0	0	.14	.28	.42	.55	.69	.83	.97	1.11	1.25
10	1.38	1.52	1.66	1.80	1.94	2.07	2.21	2.35	2.49	2.63
20	2.77	2.90	3.04	3.18	3.32	3.46	3.60	3.73	3.87	4.01
30	4.15	4.29	4.43	4.56	4.70	4.84	4.98	5.12	5.26	5.39
40	5.53	5.67	5.81	5.95	6.09	6.22	6.36	6.50	6.64	6.78
50	6.92	7.05	7.19	7.33	7.47	7.61	7.75	7.88	8.02	8.16
60	8.30	8.44	8.57	8.71	8.85	8.90	9.13	9.27	9.40	9.54
70	9.68	9.82	9.96	10.09	10.23	10.37	10.51	10.65	10.79	10.92
80	11.01	11.20	11.34	11.48	11.62	11.75	11.89	12.03	12.17	12.31
90	12.45	12.59	12.73	12.86	13.00	13.14	13.28	13.42	13.55	13.69
100	13.83	13.97	14.11	14.25	14.38	14.52	14.66	14.80	14.94	15.08
110	15.21	15.35	15.49	15.63	15.76	15.90	16.04	16.18	16.32	16.46

Decimal Equivalents of Millimeter, Fractional and Number Drill Sizes

Millimeter	Dec. Equiv.	Fractional	Drill Size Number
.1	.0039
.15	.0059
.2	.0079
.25	.0098
.3	.0118
....	.0135		80
.35	.0138
....	.0145		79
.39	.0156	1/64	..
.4	.0157
....	.0160		78
.45	.0177
....	.0180		77
.5	.0197
....	.0200		76
....	.0210		75
.55	.0217
....	.0225		74
.6	.0236
....	.0240		73
....	.0250		72
.65	.0256
....	.0260		71
....	.0280		70
.7	.0286
....	.0292		69
.75	.0295
....	.0310		68
.79	.0312	1/32	..
.8	.0315
....	.0320		67
....	.0330		66
.85	.0335
....	.0350		65
.9	.0354
....	.0360		64
....	.0370		63
.95	.0374
....	.0380		62
....	.0390		61
1.0	.0394
....	.0400		60
....	.0410		59
1.05	.0413
....	.0420		58
....	.0430		57
1.1	.0433
1.15	.0452
....	.0465		56
1.19	.0469	3/64	..
1.2	.0472
1.25	.0492
1.3	.0512
....	.0520		55
1.35	.0531
....	.0550		54
1.4	.0551
1.45	.0570
1.5	.0591
....	.0595		53
1.55	.0610
1.59	.0625	1/16
1.6	.0629
....	.0635		52
1.65	.0649
1.7	.0669
....	.0670		51
1.75	.0689
....	.0700		50
1.8	.0709
1.85	.0728
....	.0730		49
1.9	.0748
....	.0760		48
1.95	.0767
1.98	.0781	5/64	..
....	.0785		47
2.0	.0787
2.05	.0807
....	.0810		46
....	.0820		45
2.1	.0827
2.15	.0846
....	.0860		44
2.2	.0866
2.25	.0885
....	.0890		43
2.3	.0905
2.35	.0925
....	.0935		42
2.38	.0937	3/32	..
2.4	.0945
....	.0960		41
2.45	.0964
....	.0980		40
2.5	.0984
....	.0995		39
....	.1015		38
2.6	.1024
....	.1040		37
2.7	.1063
....	.1065		36
2.75	.1082
2.78	.1094	7/64	..
....	.1100		35
2.8	.1102
....	.1110		34
....	.1130		33
2.9	.1141
....	.1160		32
3.0	.1181
....	.1200		31
3.1	.1220
3.18	.1250	1/8	..
3.2	.1260
3.25.	.1279
....	.1285		30
3.3	.1299
3.4.	.1338
....	.1360		29
3.5	.1378
....	.1405		28
3.57	.1406	9/64	..
3.6	.1417
....	.1440		27
3.7	.1457
....	.1470		26
3.75	.1476
....	.1495		25
3.8	.1496
....	.1520		24
3.9	.1535
....	.1540		23
3.97	.1562	5/32	..
....	.1570		22
4.0	.1575
....	.1590		21
....	.1610		20
4.1	.1614
4.2	.1654
....	.1660		19
4.25	.1673
4.3	.1693
....	.1695		18
4.37	.1719	11/64	..
....	.1730		17
4.4	.1732
....	.1770		16
4.5	.1771
....	.1800		15
4.6	.1811
....	.1820		14
4.7	.1850		13
4.75	.1870
4.76	.1875	3/16	..
4.8	.1890		12
....	.1910		11
4.9	.1929
....	.1935		10
....	.1960		9
5.0	.1968
....	.1990		8
5.1	.2008
....	.2010		7
5.16	.2031	13/64	..
....	.2040		6
5.2	.2047
....	.2055		5
5.25	.2067
5.3	.2086
....	.2090		4
5.4	.2126
....	.2130		3
5.5	.2165
5.56	.2187	7/32	..
5.6	.2205
....	.2210		2
5.7	.2244
5.75	.2263
....	.2280		1
5.8	.2283
5.9	.2323
....	.2340		A
5.95	.2344	15/64	..
6.0	.2362
....	.2380		B
6.1	.2401
....	.2420		C
6.2	.2441
6.25	.2460		D
6.3	.2480
6.35	.2500	1/4	E
6.4	.2520
6.5	.2559
....	.2570		F
6.6	.2598
....	.2610		G
6.7	.2638
6.75	.2656	17/64	..
6.75	.2657
....	.2660		H
6.8	.2677
6.9	.2716
....	.2720		I
7.0	.2756
....	.2770		J
7.1	.2795
....	.2811		K
7.14	.2812	9/32	..
7.2	.2835
7.25	.2854
7.3	.2874
....	.2900		L
7.4	.2913
....	.2950		M
7.5	.2953
7.54	.2968	19/64	..
7.6	.2992
....	.3020		N
7.7	.3031
7.75	.3051
7.8	.3071
7.9	.3110
7.94	.3125	5/16	..
8.0	.3150
....	.3160		O
8.1	.3189
8.2	.3228
....	.3230		P
8.25	.3248
8.3	.3268
8.33	.3281	21/64	..
8.4	.3307
....	.3320		Q
8.5	.3346
8.6	.3386
....	.3390		R
8.7	.3425
8.73	.3437	11/32
8.75	.3445
8.8	.3465
....	.3480		S
8.9	.3504
9.0	.3543
....	.3580		T
9.1	.3583
9.13	.3594	23/64	..
9.2	.3622
9.25	.3641
9.3	.3661
....	.3680		U
9.4	.3701
9.5	.3740
9.53	.3750	3/8	..
....	.3770		V
9.6	.3780
9.7	.3819
9.75	.3838
9.8	.3858
....	.3860		W
9.9	.3898
9.92	.3906	25/64	..
10.0	.3937
....	.3970		X
....	.4040		Y
10.32	.4062	13/32	..
....	.4130		Z
10.5	.4134
10.72	.4219	27/64
11.0	.4330
11.11	.4375	7/16
11.5	.4528
11.51	.4531	29/64
11.91	.4687	15/32
12.0	.4724
12.30	.4843	31/64
12.5	.4921
12.7	.5000	1/2
13.0	.5118
13.10	.5156	33/64
13.49	.5312	17/32
13.5	.5315
13.89	.5469	35/64
14.0	.5512
14.29	.5625	9/16
14.5	.5709
14.68	.5781	37/64
15.0	.5906
15.08	.5937	19/32
15.48	.6094	39/64
15.5	.6102
15.88	.6250	5/8
16.0	.6299
16.27	.6406	41/64
16.5	.6496
16.67	.6562	21/32
17.0	.6693
17.06	.6719	43/64
17.46	.6875	11/16
17.5	.6890
17.86	.7031	45/64
18.0	.7087
18.26	.7187	23/32
18.5	.7283
18.65	.7344	47/64
19.0	.7480
19.05	.7500	3/4
19.45	.7656	49/64
19.5	.7677
19.84	.7812	25/32
20.0	.7874
20.24	.7969	51/64
20.5	.8071
20.64	.8125	13/16
21.0	.8268
21.03	.8281	53/64
21.43	.8437	27/32
21.5	.8465
21.83	.8594	55/64
22.0	.8661
22.23	.8750	7/8
22.5	.8858
22.62	.8906	57/64
23.0	.9055
23.02	.9062	29/32
23.42	.9219	59/64
23.5	.9252
23.81	.9375	15/16
24.0	.9449
24.21	.9531	61/64
24.5	.9646
24.61	.9687	31/32
25.0	.9843
25.03	.9844	63/64
25.4	1.0000	1

Conversion from Fractional Inches to Millimeters

inch		mm
1/64	0.015 625	0.396 875
1/32	0.031 250	0.793 750
3/64	0.046 875	1.190 625
1/16	0.062 500	1.587 500
5/64	0.078 125	1.984 375
3/32	0.093 125	2.381 250
7/64	0.109 375	2.778 125
1/8	0.125 000	3.175 000
9/64	0.140 625	3.571 875
5/32	0.156 250	3.968 750
11/64	0.171 875	4.365 625
3/16	0.187 500	4.762 500
13/64	0.203 125	5.159 375
7/32	0.218 750	5.556 250
15/64	0.234 375	5.953 125
1/4	0.250 000	6.350 000
17/64	0.265 625	6.746 875
9/32	0.281 250	7.143 750
19/64	0.296 875	7.540 625
5/16	0.312 500	7.937 500
21/64	0.328 125	8.334 375

inch		mm
11/32	0.343 750	8.731 250
23/64	0.359 375	9.128 125
3/8	0.375 000	9.525 000
25/64	0.390 625	9.921 875
13/32	0.406 250	10.318 750
27/64	0.421 875	11.112 500
7/16	0.437 500	11.509 375
29/64	0.453 125	11.906 250
15/32	0.468 750	12.303 125
31/64	0.484 375	12.303 125
1/2	0.500 000	12.700 000
33/64	0.515 625	13.096 875
17/32	0.531 250	13.493 750
35/64	0.546 875	13.890 625
9/16	0.562 500	14.287 500
37/64	0.578 125	14.684 375
19/32	0.593 750	15.081 250
39/64	0.609 375	15.478 125
5/8	0.625 000	15.875 000
41/64	0.640 625	16.271 875
21/32	0.656 250	16.668 750

inch		mm
43/64	0.671 875	17.065 625
11/16	0.687 500	17.462 500
45/64	0.703 125	17.859 375
23/32	0.718 750	18.256 250
47/64	0.734 375	18.653 125
3/4	0.750 000	19.050 000
49/64	0.765 625	19.446 875
25/32	0.781 250	19.843 750
51/64	0.796 875	20.240 625
13/16	0.812 500	20.637 500
53/64	0.828 125	21.034 375
27/32	0.843 750	21.431 250
55/64	0.859 375	21.828 125
7/8	0.875 000	22.225 000
57/64	0.890 625	22.621 875
29/32	0.906 250	23.018 750
59/64	0.921 875	23.415 625
15/16	0.937 500	23.812 500
61/64	0.953 125	24.209 375
31/32	0.968 750	24.606 250
63/64	0.984 375	25.003 125
1	1.000 000	25.400 000

NOTE: All values in this table are exact.

Conversion from Millimeters to Inches

mm	inch
1	0.039 370 08
2	0.078 740 16
3	0.118 110 24
4	0.157 480 31
5	0.196 850 39
6	0.236 220 47
7	0.275 590 55
8	0.314 960 63
9	0.354 330 71
10	0.393 700 8
11	0.433 070 9
12	0.472 440 9
13	0.511 811 0
14	0.551 181 1
15	0.590 551 2
16	0.629 921 3
17	0.669 291 3
18	0.708 661 4
19	0.748 031 5
20	0.787 401 6
21	0.826 771 7
22	0.866 141 7
23	0.905 511 8
24	0.944 881 9
25	0.984 252 0

mm	inch
26	1.023 622 0
27	1.062 992 1
28	1.102 362 2
29	1.141 732 3
30	1.181 102 4
31	1.220 472 4
32	1.259 842 5
33	1.299 212 6
34	1.338 582 7
35	1.377 952 8
36	1.417 322 8
37	1.456 692 9
38	1.496 063 0
39	1.535 433 1
40	1.574 803 1
41	1.614 173 2
42	1.653 543 3
43	1.692 913 4
44	1.732 283 5
45	1.771 653 5
46	1.811 023 6
47	1.850 393 7
48	1.889 763 8
49	1.929 133 9
50	1.968 503 9

mm	inch
51	2.007 874 0
52	2.047 244 1
53	2.086 614 2
54	2.125 984 2
55	2.165 354 3
56	2.204 724 4
57	2.244 094 5
58	2.283 464 6
59	2.322 834 6
60	2.362 204 7
61	2.401 574 8
62	2.440 944 9
63	2.480 315 0
64	2.519 685 0
65	2.559 055 1
66	2.598 425 2
67	2.637 795 3
68	2.677 165 4
69	2.716 565 4
70	2.755 905 0
71	2.795 275 6
72	2.834 645 7
73	2.874 015 7
74	2.913 385 8
75	2.952 755 9

mm	inch
76	2.992 126 0
77	3.031 496 1
78	3.070 866 1
79	3.110 236 2
80	3.149 606 2
81	3.188 976 4
82	3.228 346 5
83	3.267 716 5
84	3.307 086 6
85	3.346 456 7
86	3.385 826 8
87	3.425 196 8
88	3.464 566 9
89	3.503 937 0
90	3.543 307 1
91	3.582 677 2
92	3.622 047 2
93	3.661 417 3
94	3.700 787 4
95	3.740 157 5
96	3.779 527 6
97	3.818 897 6
98	3.858 267 7
99	3.897 637 8
100	3.937 008

NOTE: The inch values in this table are rounded off.

FORMULA TO CONVERT mm TO inches: Divide 25.4 into known mm.

Conversion from Decimal Inches to Millimeters

mm	inch
1	0.039 370 08
2	0.078 740 16
3	0.118 110 24
4	0.157 480 31
5	0.196 850 39
6	0.236 220 47
7	0.275 590 55
8	0.314 960 63
9	0.354 330 71
10	0.393 700 8
11	0.433 070 9
12	0.472 440 9
13	0.511 811 0
14	0.551 181 1
15	0.590 551 2
16	0.629 921 3
17	0.669 291 3
18	0.708 661 4
19	0.748 031 5
20	0.787 401 6
21	0.826 771 7
22	0.866 141 7
23	0.905 511 8
24	0.944 881 9
25	0.984 252 0

mm	inch
26	1.023 622 0
27	1.062 992 1
28	1.102 362 2
29	1.141 732 3
30	1.181 102 4
31	1.220 472 4
32	1.259 842 5
33	1.299 212 6
34	1.338 582 7
35	1.377 952 8
36	1.417 322 8
37	1.456 692 9
38	1.496 063 0
39	1.535 433 1
40	1.574 803 1
41	1.614 173 2
42	1.653 543 3
43	1.692 913 4
44	1.732 283 5
45	1.771 653 5
46	1.811 023 6
47	1.850 393 7
48	1.889 763 8
49	1.929 133 9
50	1.968 503 9

mm	inch
51	2.007 874 0
52	2.047 244 1
53	2.086 614 2
54	2.125 984 2
55	2.165 354 3
56	2.204 724 4
57	2.244 094 5
58	2.283 464 6
59	2.322 834 6
60	2.362 204 7
61	2.401 574 8
62	2.440 944 9
63	2.480 315 0
64	2.519 685 0
65	2.559 055 1
66	2.598 425 2
67	2.637 795 3
68	2.677 165 4
69	2.716 565 4
70	2.755 905 0
71	2.795 275 6
72	2.834 645 7
73	2.874 015 7
74	2.913 385 8
75	2.952 755 9

mm	inch
76	2.992 126 0
77	3.031 496 1
78	3.070 866 1
79	3.110 236 2
80	3.149 606 2
81	3.188 976 4
82	3.228 346 5
83	3.267 716 5
84	3.307 086 6
85	3.346 456 7
86	3.385 826 8
87	3.425 196 8
88	3.464 566 9
89	3.503 937 0
90	3.543 307 1
91	3.582 677 2
92	3.622 047 2
93	3.661 417 3
94	3.700 787 4
95	3.740 157 5
96	3.779 527 6
97	3.818 897 6
98	3.858 267 7
99	3.897 637 8
100	3.937 008

NOTE: The inch values in this table are rounded off.

FORMULA TO CONVERT mm TO inches: Divide 25.4 into known mm.

Decimal Equivalent Chart

1 mm = 0.03937 in.

1 cm = 0.3937 in.

1 dm = 3.937 in.

1 m = 39.37 in.

1 in. = 25.4 mm

1 foot = 0.3048 m

1 yd = 0.9144 m

1 sq. in. = 6.452 sq. cm

1 sq. ft = 929 sq. cm

1 sq. yd = 0.8361 sq. m

1 sq. cm = 0.155 sq. in.

1 sq. dm = 15.5 sq. in.

1 sq. m = 1.196 sq. yd

1 oz - 31.1035 grams

1 lb = 453.592 grams

1 qt = 0.9463 liters (liquid)

1 gal. = 3.7853 liters (liquid)

1 liter = 1.0567 liquid qt

Torque Value Conversions

Newton Meter Torque Value Conversions From ft/lb to Nm

ft/lb	0	1	2	3	4	5	6	7	8	9
ft/lb	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm
0	0	1.36	2.71	4.07	5.42	6.78	8.13	9.49	10.84	12.20
10	13.56	14.91	16.27	17.62	18.98	20.33	21.69	23.05	24.40	25.76
20	27.11	28.47	29.83	31.18	32.54	33.89	35.25	36.61	37.97	39.32
30	40.67	42.02	43.38	44.73	46.09	47.45	48.80	50.16	51.51	52.87
40	54.22	55.58	56.94	58.29	59.65	61.00	62.36	63.71	65.07	66.42
50	67.78	69.14	70.49	71.85	73.20	74.56	75.91	77.27	78.62	79.98
60	81.33	82.69	84.05	85.40	86.76	88.11	89.47	90.83	92.18	93.54
70	94.89	96.25	97.60	98.96	100.31	101.67	103.03	104.38	105.74	107.09
80	108.45	109.80	111.16	112.51	113.87	115.23	116.58	117.94	119.29	120.65
90	122.00	123.36	124.72	126.07	127.43	128.78	130.14	131.49	132.85	134.20
100	135.66
ft/lb x 1.3556 = Nm

From Nm to ft/lb

Nm	0	1	2	3	4	5	6	7	8	9
Nm	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb
0	0	.74	1.48	2.21	2.95	3.69	4.43	5.16	5.90	6.64
10	7.38	8.11	8.85	9.59	10.33	11.06	11.80	12.54	13.28	14.01
20	14.75	15.49	16.23	16.96	17.70	18.44	19.18	19.91	20.65	21.39
30	22.13	22.86	23.60	24.34	25.08	25.81	26.55	27.29	28.03	28.76
40	29.50	30.24	30.98	31.72	32.45	33.19	33.93	34.67	35.40	36.14
50	36.88	37.62	38.35	39.09	39.83	40.57	41.30	42.04	42.78	43.52
60	44.25	44.99	45.73	46.47	47.20	47.94	48.68	49.42	50.15	50.89
70	51.63	52.37	53.10	53.84	54.58	55.32	56.05	56.79	57.53	58.27
80	59.00	59.74	60.48	61.22	61.96	62.69	63.43	64.17	64.91	65.64
90	66.38	67.12	67.86	68.59	69.33	70.07	70.81	71.54	72.28	73.02
100	73.76
1 Nm = 0.73756 ft/lb

NOTE: The International Metric System measures torque in Newton meters (Nm).
A Newton is defined as the force necessary to move one kilogram one meter per second.

Newton Meter Torque Value Conversions From in./lb to Nm

in./lb	0	1	2	3	4	5	6	7	8	9
in./lb	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm
0	0	.113	.226	.339	.452	.565	.678	.791	.904	1.02
10	1.13	1.24	1.36	1.47	1.58	1.70	1.81	1.92	2.03	2.15
20	2.26	2.37	2.49	2.60	2.71	2.83	2.94	3.05	3.16	3.28
30	3.39	3.50	3.62	3.73	3.84	3.96	4.07	4.18	4.29	4.41
40	4.52	4.63	4.75	4.86	4.97	5.09	5.20	5.31	5.42	5.54
50	5.65	5.76	5.88	5.99	6.10	6.22	6.33	6.44	6.55	6.67
60	6.78	6.89	7.01	7.12	7.23	7.35	7.46	7.57	7.68	7.80
70	7.91	8.02	8.14	8.25	8.36	8.48	8.59	8.70	8.81	8.93
80	9.04	9.15	9.27	9.38	9.49	9.61	9.72	9.83	9.94	10.06
90	10.17	10.28	10.40	10.51	10.62	10.74	10.85	10.96	11.07	11.19
100	11.30
in./lb x .1130 = Nm

From Nm to in./lb

Nm	0	1	2	3	4	5	6	7	8	9
Nm	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb
0	0	8.85	17.70	26.55	35.40	44.25	53.10	61.95	70.81	79.66
10	88.51	97.36	106.21	115.06	123.91	132.76	141.61	150.46	159.31	168.16
20	177.01	185.86	194.72	203.57	212.42	221.27	230.12	238.98	247.82	256.67
30	265.52	274.38	283.22	292.07	300.92	309.77	318.62	327.48	336.33	345.18
40	354.03	362.88	371.73	380.58	389.43	398.28	407.13	415.98	424.83	433.68
50	442.53	451.36	460.24	469.09	477.94	486.79	495.64	504.49	513.34	522.19
60	531.04	539.89	548.74	557.59	566.44	575.30	584.15	592.10	601.85	610.70
70	619.55	628.40	637.25	646.10	654.95	663.80	672.65	681.50	690.35	699.20
80	708.06	716.91	725.76	734.61	743.46	752.31	761.16	770.01	778.86	787.21
90	796.56	805.41	814.26	823.12	831.97	840.82	849.67	858.52	867.37	876.22
100	885.07
Nm x 8.8507 = in./lb

NOTE: The International Metric System measures torque in Newton meters (Nm).
A Newton is defined as the force necessary to move one kilogram one meter per second.

Newton Meter Torque Value Conversions From in./oz to Nm

in./oz	0	1	2	3	4	5	6	7	8	9
in./oz	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm
0	0	.007	.014	.021	.028	.035	.042	.049	.056	.064
10	.071	.078	.085	.092	.098	.106	.113	.120	.127	.134
20	.141	.148	.155	.162	.169	.177	.184	.191	.198	.205
30	.212	.219	.226	.232	.240	.247	.254	.261	.268	.275
40	.282	.289	.297	.304	.312	.318	.324	.332	.339	.346
50	.353	.360	.367	.374	.381	.388	.395	.402	.409	.417
60	.424	.431	.438	.445	.452	.459	.466	.473	.480	.487
70	.494	.501	.508	.515	.522	.530	.537	.544	.551	.558
80	.565	.572	.579	.586	.593	.600	.607	.614	.621	.628
90	.635	.642	.650	.657	.664	.671	.678	.685	.692	.699
100	.706
in./oz x .00706 = Nm

From Nm to in./oz

Nm	0	1	2	3	4	5	6	7	8	9
Nm	in./oz	in./oz	in./oz	in./oz	in./oz	in./oz	in./oz	in./oz	in./oz	in./oz
.0	0	1.42	2.83	4.25	5.66	7.08	8.50	9.91	11.33	12.74
.1	14.16	15.58	16.99	18.41	19.83	21.24	22.66	24.07	25.49	26.91
.2	28.32	29.74	31.15	32.57	33.99	35.40	36.82	38.23	39.65	41.07
.3	42.48	43.90	45.32	46.73	48.15	49.56	50.98	52.40	53.81	55.23
.4	56.64	58.06	59.48	60.89	62.31	63.72	65.14	66.56	67.97	69.39
.5	70.81	72.22	73.64	75.05	76.47	77.89	79.30	80.72	82.13	83.55
.6	84.97	86.41	87.80	89.21	90.63	92.05	93.46	94.88	96.30	97.71
.7	99.13	100.54	101.96	103.38	104.79	106.21	107.62	109.04	110.46	111.87
.8	113.29	114.70	116.12	117.54	118.95	120.37	121.79	123.20	124.62	126.03
.9	127.45	128.87	130.28	131.70	133.11	134.53	135.95	137.36	138.78	140.19
1.0	141.61
.01 Nm x 141.6112 = .01 in./oz

NOTE: The International Metric System measures torque in Newton meters (Nm).
A Newton is defined as the force necessary to move one kilogram one meter per second.

Newton Meter Torque Value Conversions From m/kg to Nm

m/kg	0	1	2	3	4	5	6	7	8	9
m/kg	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm	Nm
0	0	9.81	19.61	29.42	39.23	49.03	58.84	68.65	78.45	88.26
10	98.07	107.87	117.68	127.49	137.30	147.10	156.90	166.71	176.52	186.33
20	196.13	205.94	215.75	225.55	235.36	245.17	254.98	264.78	274.59	284.40
30	294.20	304.00	313.81	323.62	333.43	343.23	353.04	362.85	372.65	382.46
40	392.27	402.07	411.88	421.69	431.49	441.30	451.11	460.91	470.72	480.53
50	490.33	500.14	509.95	519.75	529.56	539.37	549.17	558.95	568.79	578.60
60	588.40	598.21	608.01	617.82	627.63	637.43	647.24	657.05	666.86	676.66
70	686.47	696.27	706.08	715.89	725.70	735.50	745.30	755.11	764.92	774.73
80	784.53	794.34	804.15	813.95	823.76	833.57	843.37	853.18	862.99	872.79
90	882.60	892.41	902.21	912.02	921.83	931.63	941.44	951.25	961.05	970.86
100	980.67
m/kg (or kpm) = 9.80665 Nm

From Nm to m/kg

Nm	0	1	2	3	4	5	6	7	8	9
Nm	m/kg	m/kg	m/kg	m/kg	m/kg	m/kg	m/kg	m/kg	m/kg	m/kg
0	0	.102	.204	.306	.408	.510	.611	.714	.816	.918
10	1.020	1.122	1.224	1.326	1.428	1.530	1.632	1.733	1.835	1.937
20	2.039	2.141	2.243	2.345	2.447	2.549	2.651	2.753	2.855	2.957
30	3.059	3.161	3.263	3.365	3.467	3.569	3.671	3.773	3.875	3.977
40	4.079	4.181	4.283	4.385	4.487	4.589	4.691	4.793	4.895	4.997
50	5.099	5.200	5.302	5.404	5.506	5.608	5.710	5.812	5.914	6.016
60	6.118	6.220	6.322	6.424	6.526	6.628	6.730	6.832	6.934	7.036
70	7.138	7.240	7.342	7.444	7.546	7.648	7.750	7.852	7.954	8.056
80	8.158	8.260	8.362	8.464	8.565	8.667	8.769	8.871	8.973	9.075
90	9.177	9.279	9.381	9.483	9.585	9.687	9.789	9.891	9.993	10.095
100	10.197
Nm x .10197 = m/kg (or kpm)

NOTE: The International Metric System measures torque in Newton meters (Nm).
A Newton is defined as the force necessary to move one kilogram one meter per second.

Torque Value Conversions From in./lb to in./oz

in./lb	0	1	2	3	4	5	6	7	8	9
in./lb	in./oz	in./oz	in./oz	in./oz	in./oz	in./oz	in./oz	in./oz	in./oz	in./oz
0	0	16	32	48	64	80	96	112	128	144
10	160	176	192	208	224	240	256	272	288	304
20	320	336	352	368	384	400	416	432	448	464
30	480	496	512	528	544	560	576	592	608	624
40	640	656	672	688	704	720	736	752	768	784
50	800	816	832	848	864	880	896	912	928	944
60	960	976	992	1008	1024	1040	1056	1072	1088	1104
70	1120	1236	1152	1168	1184	1200	1216	1232	1248	1264
80	1280	1296	1312	1328	1344	1360	1376	1392	1408	1424
90	1440	1456	1472	1488	1504	1520	1536	1552	1568	1584
100	1600
in./lb x 16 = in./oz

From in./oz to in./lb

in./oz	0	1	2	3	4	5	6	7	8	9
in./oz	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb
0	0	.063	.125	.188	.250	.313	.375	.438	.500	.563
10	.625	.688	.750	.813	.875	.938	1.000	1.063	1.125	1.188
20	1.250	1.313	1.375	1.438	1.500	1.563	1.625	1.688	1.750	1.813
30	1.875	1.938	2.000	2.063	2.125	2.188	2.250	2.313	2.375	2.458
40	2.500	2.563	2.625	2.688	2.750	2.813	2.875	2.938	3.000	3.063
50	3.125	3.188	3.250	3.313	3.375	3.438	3.500	3.563	3.625	3.688
60	3.750	3.813	3.875	3.938	4.000	4.063	4.125	4.188	4.250	4.313
70	4.375	4.438	4.500	4.563	4.625	4.688	4.750	4.813	4.875	4.938
80	5.000	5.063	5.125	5.188	5.250	5.313	5.375	5.438	5.500	5.563
90	5.625	5.688	5.750	5.813	5.875	5.938	6.000	6.063	6.125	6.188
100	6.250
in./oz � 16 in./lb

NOTE: One meter kilogram is equal to one meter kilopod (expressed as: 1 m/kg - 1kgm)

Torque Value Conversions From ft/lb to in/.lb

ft/lb	0	1	2	3	4	5	6	7	8	9
ft/lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb
0	0	12	24	36	48	60	72	84	96	108
10	120	132	144	156	168	180	192	204	216	228
20	240	252	264	276	288	300	312	324	336	348
30	360	372	384	396	308	420	432	444	456	468
40	480	492	504	516	528	540	552	564	576	588
50	600	612	624	636	648	660	672	684	696	708
60	720	732	744	756	768	780	792	804	816	828
70	840	852	864	876	888	900	912	924	936	948
80	960	972	984	996	1008	1020	1032	1044	1056	1068
90	1080	1092	1104	1116	1128	1140	1152	1164	1176	1188
100	1200
ft/lb x 12 = in./lb

From in./lb to ft/lb

in./lb	0	1	2	3	4	5	6	7	8	9
in./lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb
0	0	.083	.167	.250	.333	.417	.500	.583	.667	.750
10	.833	.917	1.000	1.083	1.167	1.250	1.333	1.417	1.500	1.583
20	1.667	1.750	1.833	1.917	2.000	2.083	2.167	2.250	2.333	2.417
30	2.500	2.583	2.667	2.750	2.833	2.917	3.000	3.083	3.167	3.250
40	3.333	3.417	3.500	3.583	3.667	3.750	3.833	3.917	4.000	4.083
50	4.167	4.250	4.333	4.417	4.500	4.583	4.667	4.750	4.833	4.917
60	5.000	5.083	5.167	5.250	5.333	5.417	5.500	5.583	5.667	5.750
70	5.833	5.917	6.000	6.083	6.167	6.250	6.333	6.417	6.500	6.583
80	6.667	6.750	6.833	6.917	7.000	7.083	7.167	7.250	7.333	7.417
90	7.500	7.583	7.667	7.750	7.833	7.917	8.000	8.083	8.167	8.250
100	8.333
in./lb � 12 ft/lb

NOTE: One meter kilogram is equal to one meter kilopod (expressed as: 1 m/kg - 1kgm)

Torque Value Conversions From in./lb to cm/kg

in./lb	0	1	2	3	4	5	6	7	8	9
in./lb	cm/kg	cm/kg	cm/kg	cm/kg	cm/kg	cm/kg	cm/kg	cm/kg	cm/kg	cm/kg
0	0	1.152	2.304	3.456	4.608	5.760	6.912	8.064	9.217	10.36
10	11.52	12.67	13.83	14.97	16.13	17.28	18.43	19.59	20.74	21.89
20	23.04	24.19	25.35	26.49	27.65	28.80	29.96	31.07	32.26	33.41
30	34.56	35.71	36.87	38.02	37.17	40.32	41.47	42.62	43.77	36.60
40	46.09	47.23	48.39	49.45	50.69	51.85	52.99	54.14	55.29	56.45
50	57.61	58.75	59.90	61.06	62.21	63.37	64.51	65.66	66.81	67.96
60	69.13	70.27	71.42	72.57	73.73	74.89	76.03	77.18	78.33	79.49
70	80.65	81.79	82.94	84.05	85.21	86.41	87.58	88.75	89.91	91.00
80	92.17	93.32	94.49	95.66	96.83	97.93	99.08	100.2	101.4	102.6
90	103.7	104.9	106.1	107.2	108.3	109.5	110.7	111.8	112.9	114.1
100	115.2
In./lb x 1.152 = cm/kg

From cm/kg to in./lb

cm/kg	0	1	2	3	4	5	6	7	8	9
cm/kg	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb	in./lb
0	0	.868	1.735	2.603	3.471	4.339	5.206	6.074	6.942	7.809
10	8.677	9.545	10.412	11.280	12.148	13.016	13.883	14.751	15.619	16.486
20	17.354	18.222	19.089	19.957	20.825	21.693	22.560	23.428	24.296	25.163
30	26.031	26.899	27.766	28.634	29.502	30.370	31.237	32.105	32.973	33.840
40	34.708	35.576	36.443	37.311	38.179	39.047	39.914	40.782	41.650	42.517
50	43.385	44.253	45.120	45.988	46.856	47.724	48.591	49.459	50.327	51.194
60	52.062	52.930	53.797	54.665	55.533	56.401	57.268	58.136	59.004	59.871
70	60.739	61.607	62.474	63.342	64.010	65.078	65.945	66.813	67.681	68.548
80	69.416	70.284	71.151	72.019	72.887	73.754	74.622	75.490	76.358	77.225
90	78.093	78.961	79.828	80.670	81.564	82.432	83.299	84.167	85.035	85.902
100	86.770
cm/kg x .8677 = in./lb

NOTE: One meter kilogram is equal to one meter kilopod (expressed as: 1 m/kg - 1kgm)

Torque Value Conversions From ft/lb to m/kg

ft/lb	0	1	2	3	4	5	6	7	8	9
ft/lb	m/kg	m/kg	m/kg	m/kg	m/kg	m/kg	m/kg	m/kg	m/kg	m/kg
0	0	0.138	0.277	0.415	0.553	0.691	0.830	0.968	1.106	1.245
10	1.383	1.521	1.660	1.798	1.936	2.074	2.212	2.351	2.489	2.628
20	2.766	2.904	3.043	3.181	3.319	3.457	3.596	3.734	3.872	4.011
30	4.149	4.287	4.426	4.564	4.702	4.840	4.979	5.117	5.255	5.394
40	5.532	5.670	5.809	5.947	6.085	6.223	6.362	6.500	6.638	6.777
50	6.915	7.053	7.191	7.330	7.468	7.606	7.745	7.883	8.021	8.159
60	8.298	8.136	8.574	8.713	8.851	8.989	9.128	9.266	9.404	9.543
70	9.681	9.819	9.957	10.09	10.23	10.37	10.51	10.65	10.79	10.92
80	11.06	11.20	11.34	11.48	11.62	11.75	11.89	12.03	12.17	12.31
90	12.45	12.59	12.73	12.86	13.00	13.14	13.28	13.42	13.55	13.69
100	13.83
ft/lb x .1383 = m/kg

From m/kg to ft/lb

m/kg	0	1	2	3	4	5	6	7	8	9
m/kg	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb	ft/lb
0	0	7.23	14.47	21.70	28.93	36.17	43.40	50.63	57.86	65.10
10	72.4	79.6	86.8	94.0	101.3	108.5	115.7	123.0	130.2	137.4
20	144.7	151.9	159.1	166.4	173.6	180.8	188.1	195.3	202.5	209.8
30	217.0	224.2	231.5	238.7	245.9	253.2	260.4	267.6	274.9	284.1
40	289.3	296.6	303.9	311.0	318.3	325.5	332.7	340.0	347.2	354.4
50	361.7	368.9	376.1	383.3	390.6	397.8	405.0	412.3	419.2	426.7
60	434.0	441.2	448.4	455.7	462.9	470.1	477.7	484.6	491.8	499.1
70	506.3	513.5	520.8	528.0	535.2	542.5	549.7	556.9	564.2	571.4
80	578.6	585.9	593.1	600.3	607.6	614.8	622.0	629.3	636.5	643.7
90	651.0	658.2	665.4	672.7	679.9	687.1	694.4	701.6	708.8	716.1
100	723.3
m/kg x 7.233 = ft/lb

NOTE: One meter kilogram is equal to one meter kilopod (expressed as: 1 m/kg - 1kgm)

Standard Torque Value Chart

Fastener Type:	SAE 0-1-2
Min. Tensile Strength:	74,000 PSI
Material:	Low Carbon Steel

Torque Chart

Fastener Type:	SAE 3
Min. Tensile Strength:	100,000 PSI
Material:	Medium Carbon Steel

Torque Chart

Fastener Type:	SAE 5
Min. Tensile Strength:	120,000 PSI
Material:	Medium Carbon Heat Treated Steel

Torque Chart

Fastener Type:	SAE 6
Min. Tensile Strength:	133,000 PSI
Material:	Medium Carbon Steel Quenched Tempered

Torque Chart

Fastener Type:	SAE 7
Min. Tensile Strength:	133,000 PSI
Material:	Medium Carbon Alloy Steel

Torque Chart

Fastener Type:	SAE 8
Min. Tensile Strength:	160,000 PSI
Material:	Medium Carbon Alloy Steel

Torque Chart

Fastener Type:	Socket Head Cap Screw
Min. Tensile Strength:	160,000 PSI
Material:	High Carbon Case Hardened Steel

Torque Chart

Fastener Type:	Socket Set Screw
Min. Tensile Strength:	212,000 PSI
Material:	High Carbon Case Hardened Steel

Torque Chart

Fastener Type:	Machine Screw Yellow Brass
Min. Tensile Strength:	60,000 PSI
Material:	Copper (CU) 63% Zinc (ZN) 37%

Torque Chart

Fastener Type:	Silicone Bronze Fastener Type "B"
Min. Tensile Strength:	100,000 PSI
Material:	Copper (CU) 96% Zinc (ZN) 2% Silicon (SI) 2%

Torque Chart

Use SAE 2,5 or 8 values when grade is known, with a nut of sufficient strength.

Standard Torque Value Chart For Metric Fasteners

TORQUE - KILO-NEWTON

CLASS		4.6	4.8	5.8	8.8	9.8	10.9	12.9
PROOF LOAD Mpa		225	310	380	600	650	830	970
FASTENER
	Dia (in.)
M1.6x0.35	(0.063)		0.39			0.83		1.23
M2x0.4	(0.079)		0.64			1.35		2.01
M2.5x0.45	(0.098)		1.05			2.20		3.29
M3x0.5	(0.118)		1.56			3.27		4.88
M3.4x0.6	(0.138)		2.10			4.41		6.58
M4x0.7	(0.157)		2.72			5.71		8.52
M5x0.8	(0.197)	3.20	4.40	5.40		9.23	11.80	13.80
M6.3x1	(0.248)	5.09	7.01	8.59		14.70	18.80	21.90
M8x1.25	(0.315)	8.24	11.30	13.90		23.80	30.40	35.50
M10x1.5	(0.394)	13.10	18.00	22.00		37.70	48.10	56.30
M12x1.75	(0.472)	19.00	26.10	32.00		54.80	70.00	81.80
M14x2	(0.551)	25.90	35.70	43.70		74.80	95.40	112.00
M16x2	(0.630)	35.30	48.70	59.70	94.20	102.00	130.00	152.00
M20x2.5	(0.787)	55.10		93.10	147.00		203.00	238.00
M24x3	(0.945)	79.40		134.00	212.00		293.00	342.00
M30x3.5	(1.181)	126.00			337.00		466.00	544.00
M36x4	(1.417)	184.00			490.00		678.00	792.00

CONVERSION GUIDANCE
Class 4.6 is approximately equal to SAE Grade 1, and ASTM A307, Grade A.
Class 5.8 is approximately equal to SAE Grade 2.
Class 8.8 is approximately equal to SAE Grade 5, and ASTM A449.
Class 9.8 has properties approximately 9 percent stronger than SAE Grade 5, and ASTM A449.
Class 10.9 is approximately equal to SAE Grade 8, and ASTM A354, Grade BD.

Torque Adapter Usage

How to Use Proto Torque Adapters

Proto torque adapters are designed with a center-to-center dimension of 2". This means that the distance from the center of the square drive of the mating torque wrench to the center of the fasteners is exactly 2". This constant dimension serves to simplify the process of calculating the torque applied.

The steps as required to calculate torque when using a Proto torque adapter are as follows:

Determine the amount of torque required to properly set the fastener.
Determine the length of the torque wrench from the center of the grip to the center of the square drive (remember that this changes as you adjust the torque wrench setting).
Multiply the amount of torque you are trying to apply (1) by the length of the torque wrench from (2) above.
Add 2" for the torque adapter length to (2).
Divide the result from (3) by the result from (4). The result is the torque wrench setting required to properly torque the fastener.

For example, you want to torque a grade 8 fastener with a thread diameter of 3/8" and a hex size of 9/16", using a Proto 6006AB torque wrench.

From the Standard Torque Value Chart the recommended bolt torque is 47 foot-pounds.
The 6006AB torque wrench dimension is 10".
The torque, 47 foot-pounds, multiplied by the length of 10 inches is 470.
Adding 2" for the torque adapter to the torque wrench length of 10" equals 12".
Dividing 470 by 12 results in a torque wrench setting of 39 foot-pounds. This will result in the desired 47 foot-pounds at the fastener.

Following this procedure results in an accuracy of ±2% (added to the accuracy of the torque wrench it becomes W6% total). For greater accuracy, another iteration can be performed using a measurement of the torque wrench from the center of the grip (set at 39 foot-pounds) to the center of the square drive.

Sizing Charts

Standard Bolt Sizing Charts for Nuts

Nominal Opening of Proto Wrenches or Sockets in Inches to Fit Standard Nuts

Locate thread diameter of nut in left column. Then move across to box which has proper identification of nut at top of vertical column. The size in this particular box is the nominal opening size in inches of the PROTO wrench and sockets that will fit.

Thread Diameter of Nut	Finished Series and Finished Thick Nuts	Regular Series Hex and Square Nuts	Heavy Series Hex and Square Nuts	Machine Screw Nuts and Stove Bolt Nuts
	Use wrench or socket size shown below
#0 & 1				5/32
#2 & 3				3/16
#4				1/4
#5 & 6				5/16
#8				11/32
#10				3/8
#12				7/16
1/4"	7/16	7/16	1/2	7/16
5/16"	1/2	9/16	9/16	9/16
3/8"	9/16	5/8	11/16	5/8
7/16"	11/16	3/4	3/4
1/2"	3/4	13/16	7/8
9/16"	7/8	7/8	15/16
5/8"	15/16	1	1 1/16
3/4"	1 1/8	1 1/8	1 1/4
7/8"	1 5/16	1 5/16	1 7/16
1"	1 1/2	1 1/2	1 5/8
1 1/8"	1 11/16	1 11/16	1 13/16
1 1/4"	1 7/8	1 7/8	2
1 3/8"	2 1/16	2 1/16	2 3/16
1 1/2"	2 1/4	2 1/4	2 3/8
1 5/8"	2 7/16	2 7/16	2 9/16
1 3/4"	2 5/8	2 5/8	2 3/4
1 7/8"	2 13/16	2 13/16	2 15/16
2"	3	3	3 1/8
2 1/4"	3 3/8	3 3/8	3 1/2
2 1/2"	3 3/4	3 3/4	3 7/8
2 3/4"	4 1/8	4 1/8	4 1/4
3"	4 1/2	4 1/2	4 5/8
3 1/4"			5
3 1/2"			5 3/8
3 3/4"			5 3/4
4"			6 1/2
4 1/4"			6 1/2
4 1/2"			6 7/8
4 3/4"			7 1/4
5"			7 5/8
5 1/4"			8
5 1/2"			8 3/8
5 3/4"			8 3/4
6"			9

Standard Bolt Sizing Charts for Bolts and Screws

Nominal Opening of Proto Wrenches or Sockets in Inches
to Fit Standard Bolt Heads and Screw Heads

Locate thread diameter of bolt or screw in left column. Then move across to box which has proper identification of bolt or screw at top of vertical column. The size in this particular box is the nominal opening size in inches of the PROTO wrench and sockets that will fit.

Thread Diameter of Bolt or of Screw	Regular and Finished Series Hex and Square Head Bolts	Heavy Series Hex and Square Head Bolts	Lag Screws	Square Head Set Screws
	Use wrench or socket size shown below
#0 & 1
#2 & 3
#4
#5 & 6
#8
#10			5/16	3/16
#12				7/32
1/4"	�3/8 -1/4		3/8	1/4
5/16"	1/2		1/2	5/16
3/8"	9/16		9/16	3/8
7/16"	5/8		5/8	7/16
1/2"	3/4	7/8	3/4	1/2
9/16"	13/16			9/16
5/8"	15/16	1 1/16	15/16	5/8
3/4"	11/8	1 1/4	1 1/8	3/4
7/8"	15/16	1 7/16	1 5/16	7/8
1"	1 1/2	1 5/8	1 1/2	1
1 1/8"	1 11/16	1 13/16	1 11/16	1 1/8
1 1/4"	1 7/8	2	1 7/8	1 1/4
1 3/8"	2 1/16	2 3/16		1 3/8
1 1/2"	2 1/4	2 3/8		1 1/2
1 5/8"	2 7/16	2 9/16
1 3/4"	2 5/8	2 3/4
1 7/8"	2 13/16	2 15/16
2"	3	3 1/8
2 1/4"	3 3/8	3 1/2
2 1/2"	3 3/4	3 7/8
2 3/4"	4 1/8	4 1/4
3"	4 1/2	4 5/8
3 1/4"	4 7/8
3 1/2"	5 1/4
3 3/4"	5 5/8
4"	6
�Regular Square Bolts Only.

Standard Wrench Sizing Chart for Nuts

STANDARD WRENCH SIZING CHART

Nominal Opening of Proto Wrenches or Sockets in Millimeters to Fit Standard Nuts

WRENCH OR SOCKET SIZE		SQUARE NUTS & HEAVY SQUARE NUTS	TRACK, HEAVY HEX & SQUARE, FLAT AND JAM NUTS	SQUARE MACHINE SCREW NUT	HEX NUTS & FLAT CASTLE, SLOTTED AND HAM HEX NUTS	HEX FLANGE NUTS	TRACK BOLT NUTS	HEX LOCK NUTS
ACROSS FLATS	DECIMAL EQUIV.	SQUARE NUTS & HEAVY SQUARE NUTS	TRACK, HEAVY HEX & SQUARE, FLAT AND JAM NUTS	SQUARE MACHINE SCREW NUT	HEX NUTS & FLAT CASTLE, SLOTTED AND HAM HEX NUTS	HEX FLANGE NUTS	TRACK BOLT NUTS	HEX LOCK NUTS
1/8	0.1250	�	�	�	�	�	�	�
5/32	0.1562	�	�	#0&1	�	�	�	�
3/16	0.1875	�	�	#2&3	�	�	�	�
1/4	0.2500	�	�	#4	�	�	�	#4
9/32	0.2812	�	�	�	�	�	�	�
5/16	0.3125	�	�	#5&6	�	#6	�	#6
11/32	0.3438	�	�	#8	�	#8	�	#8
3/8	0.3750	�	�	#10	�	#10	�	#10
7/16	0.4375	1/4	�	#12&14	1/4	#12&14	�	#12&14
1/2	0.5000	1/4	1/4	�	5/16	5/16	�	5/16
9/16	0.5625	5/16	5/16	5/16	3/8	3/8	�	3/8
5/8	0.6250	3/8	�	3/8	�	�	�	�
11/16	0.6875	3/8	3/8	�	7/16	7/16	�	7/16
3/4	0.7500	7/16	7/16	�	1/2	1/2	�	1/2
13/16	0.8125	1/2	�	�	�	�	�	�
7/8	0.8750	1/2	1/2	�	9/16	9/16	�	9/16
15/16	0.9375	�	9/16	�	5/8	5/8	�	5/8
1	1.0000	5/8	�	�	�	�	�	�
1 1/16	1.0625	5/8	5/8	�	�	�	�	�
1 1/8	1.1250	3/4	�	�	3/4	3/4	�	3/4
1 1/4	1.2500	3/4	3/4	�	�	�	3/4 & 13/16	�
1 5/16	1.3125	7/8	�	�	7/8	�	�	7/8
1 3/8	1.3750	�	�	�	�	�	�	�
1 7/16	1.4375	7/8	7/8	�	�	�	7/8	�
1 1/2	1.5000	1	�	�	1	�	15/16 & 1	1
1 5/8	1.6250	1	1	�	�	�	1 & 11/16	�
1 11/16	1.6875	1 1/8	�	�	1 1/8	�	1 1/8	1 1/8
1 13/16	1.8125	1 1/8	1 1/8	�	�	�	1 1/8	�
1 7/8	1.8750	1 1/4	�	�	1 1/4	�	�	1 1/4
2	2.0000	1 1/4	1 1/4	�	�	�	�	�
2 1/16	2.0625	1 3/8	�	�	1 3/8	�	�	1 3/8
2 3/16	2.1875	1 3/8	1 3/8	�	�	�	�	�
2 1/4	2.2500	1 1/2	�	�	1 1/2	�	�	1 1/2
2 3/8	2.3750	1 1/2	1 1/2	�	�	�	�	�
2 7/16	2.4375	�	�	�	�	�	�	�
2 9/16	2.5625	�	1 5/8	�	�	�	�	�
2 5/8	2.6250	�	�	�	�	�	�	�
2 3/4	2.7500	�	1 3/4	�	�	�	�	�
2 13/16	2.8125	�	�	�	�	�	�	�
2 15/16	2.9375	�	1 7/8	�	�	�	�	�
3	3.0000	�	�	�	�	�	�	�
3 1/8	3.1250	�	2	�	�	�	�	�
3 3/8	3.3750	�	�	�	�	�	�	�
3 1/2	3.5000	�	2 1/4	�	�	�	�	�
3 3/4	3.7500	�	�	�	�	�	�	�
3 7/8	3.8750	�	2 1/2	�	�	�	�	�
4 1/8	4.1250	�	�	�	�	�	�	�
4 1/4	4.2500	�	2 3/4	�	�	�	�	�
4 1/2	4.5000	�	�	�	�	�	�	�
4 5/8	4.6250	�	3	�	�	�	�	�
4 7/8	4.8750	�	�	�	�	�	�	�
5	5.0000	�	3 1/4	�	�	�	�	�
5 1/4	5.2500	�	3 1/2	�	�	�	�	�
5 3/8	5.3750	�	3 1/2	�	�	�	�	�
5 5/8	5.6250	�	3 3/4	�	�	�	�	�
5 3/4	5.7500	�	3 3/4	�	�	�	�	�
6	6.0000	�	4	�	�	�	�	�
6 1/8	6.1250	�	4	�	�	�	�	�
6 1/2	6.5000	�	�	�	�	�	�	�
6 7/8	6.8750	�	�	�	�	�	�	�
7 1/4	7.2500	�	�	�	�	�	�	�
7 5/8	7.6250	�	�	�	�	�	�	�
8	8.0000	�	�	�	�	�	�	�
8 3/8	8.3750	�	�	�	�	�	�	�
8 3/4	8.7500	�	�	�	�	�	�	�
9 1/8	9.1250	�	�	�	�	�	�	�

Standard Wrench Sizing Chart for Bolts and Screws

BOLT SIZING CHART

Nominal Opening of Proto Wrenches or Sockets in Millimeters to Fit Standard Bolt Heads and Screw Heads

Locate thread diameter of bolt or screw in left column. Then move across to box which has proper identification of bolt or screw at top of vertical column. The size in this particular box is the nominal opening size in inches of the PROTO wrench and sockets that will fit.

Thread Diameter of BOLTS or SCREWS	HEX BOLTS	HEAVY HEX BOLTS	HEAVY HEX STRUCTURAL BOLTS
	Use wrench or socket size shown below
M1.6 x 0.35	�	�	�
M2 x 0.4	�	�	�
M2.5 x 0.45	�	�	�
M3 x 0.5	�	�	�
M3.5 x 0.6	�	�	�
M5 x 0.7	�	�	�
M5 x 0.8	8.00	�	�
M6 x 1	10.00	�	�
M8 x 1.25	13.00	�	�
M10 x 1.5	15.00 & 16.00	�	�
M12 x 1.75	18.00	21.00	�
M14 x 2	21.00	24.00	�
M16 x 2	24.00	27.00	27.00
M20 x 2.5	30.00	34.00	34.00
M22 x 2.5	�	�	36.00
M24 x 3	36.00	41.00	41.00
M27 x 3	�	�	46.00
M30 x 3.5	46.00	50.00	50.00
M36 x 4	55.00	60.00	60.00
M42 x 4.5	65.00	�	�
M48 x 5	75.00	�	�
M56 x 5.5	85.00	�	�
M64 x 6	95.00	�	�
M72 x 6	105.00	�	�
M80 x 6	115.00	�	�
M90 x 6	130.00	�	�
M100 x 6	145.00	�	�

Metric Bolt Sizing Charts for Nuts

BOLT SIZING CHART

Nominal Opening of Proto Wrenches or Sockets in Millimeters
to Fit Standard Nuts

Locate thread diameter of nut in left column. Then move across to box which has proper identification of nut at top of vertical column. The size in this particular box is the nominal opening size in inches of the PROTO wrench and sockets that will fit.

Thread Diameter of NUTS	HEX NUTS STYLE 1	HEX NUTS STYLE 2	SLOTTED AND HAM HEX NUTS	HEAVY HEX BOLTS
	Use wrench or socket size shown below
M1.6 x 0.35	3.20	�	�	�
M2 x 0.4	4.00	�	�	�
M2.5 x 0.45	5.00	�	�	�
M3 x 0.5	5.50	5.50	�	�
M3.5 x 0.6	6.00	6.00	�	�
M4 x 0.7	7.00	7.00	�	�
M5 x 0.8	8.00	8.00	8.00	�
M6 x 1	10.00	10.00	10.00	�
M8 x 1.25	13.00	13.00	13.00	�
M10 x 1.5	15.00 & 16.00	15.00 & 16.00	15.00 & 16.00	�
M12 x 1.75	18.00	18.00	18.00	21.00
M14 x 2	21.00	21.00	21.00	24.00
M16 x 2	24.00	24.00	24.00	27.00
M20 x 2.5	30.00	30.00	30.00	34.00
M22 x 2.5	�	�	�	36.00
M24 x 3	36.00	36.00	36.00	41.00
M27 x 3	�	�	�	46.00
M30 x 3.5	46.00	46.00	46.00	50.00
M36 x 4	55.00	55.00	55.00	60.00
M42 x 4.5	�	�	�	70.00
M48 x 5	�	�	�	80.00
M56 x 5.5	�	�	�	90.00
M64 x 6	�	�	�	100.00
M72 x 6	�	�	�	110.00
M80 x 6	�	�	�	120.00
M90 x 6	�	�	�	135.00
M100 x 6	�	�	�	150.00

Metric Bolt Sizing Charts for Bolts and Screws

METRIC WRENCH SIZING CHART

Nominal Opening of Proto Wrenches or Sockets in Millimeters to Fit Standard Bolt Heads and Screw Heads

Locate thread diameter of bolt or screw in left column. Then move across to box which has proper identification of bolt or screw at top of vertical column. The size in this particular box is the nominal opening size in inches of the PROTO wrench and sockets that will fit.

WRENCH OR SOCKET SIZE ACROSS FLATS	HEX BOLTS	HEAVY HEX BOLTS	HEAVY HEX STRUCTURAL BOLTS
	Use wrench or socket size shown below?
3.20	�	�	�
4.00	�	�	�
5.00	�	�	�
5.50	�	�	�
6.00	�	�	�
7.00	�	�	�
8.00	M5 x 0.8	�	�
10.00	M6 x 1	�	�
13.00	M8 x 1.25	�	�
15.00	M10 x 1.5	�	�
16.00	M10 x 1.5	�	�
18.00	M12 x 1.75	�	�
21.00	M14 x 2	M12 x 1.75	�
24.00	M16 x 2	M14 x 2	�
27.00	�	M16 x 2	M16 x 2
30.00	M20 x 2.5	�	�
34.00	�	M20 x 2.5	M20 x 2.5
36.00	M24 x 3	�	M22 x 2.5
41.00	�	M24 x 3	M24 x 3
46.00	M30 x 3.5	�	M27 x 3
50.00	�	M30 x 3.5	M30 x 3.5
55.00	M36 x 4	�	�
60.00	�	M36 x 4	M36 x 4
65.00	M42 x 4.5	�	�
70.00	�	�	�
75.00	M48 x 5	�	�
80.00	�	�	�
85.00	M56 x 5.5	�	�
90.00	�	�	�
95.00	M64 x 6	�	�
100.00	�	�	�
105.00	M72 x 6	�	�
110.00	�	�	�
115.00	M80 x 6	�	�
120.00	�	�	�
130.00	M90 x 6	�	�
135.00	�	�	�
145.00	M100 x 6	�	�
150.00	�	�	�

Metric Wrench Sizing Chart for Nuts

METRIC WRENCH SIZING CHART

Nominal Opening of Proto Wrenches or Sockets in Millimeters to Fit Standard Nuts

Locate thread diameter of nut in left column. Then move across to box which has proper identification of nut at top of vertical column. The size in this particular box is the nominal opening size in inches of the PROTO wrench and sockets that will fit.

WRENCH OR SOCKET SIZE ACROSS FLATS	HEX NUTS STYLE 1	HEX NUTS STYLE 1	SLOTTED AND HAM HEX NUTS	HEAVY HEX NUTS
	Use wrench or socket size shown below
3.20	M1.6 x 0.35	�	�	�
4.00	M2 x 0.4	�	�	�
5.00	M2.5 x 0.45	�	�	�
5.50	M3 x 0.5	M3 x 0.5	�	�
6.00	M3.5 x 0.6	M3.5 x 0.6	�	�
7.00	M4 x 0.7	M4 x 0.7	�	�
8.00	M5 x 0.8	M5 x 0.8	M5 x 0.8	�
10.00	M6 x 1	M6 x 1	M6 x 1	�
13.00	M8 x 1.25	M8 x 1.25	M8 x 1.25	�
15.00	M10 x 1.5	M10 x 1.5	M10 x 1.5	�
16.00	M10 x 1.5	M10 x 1.5	M10 x 1.5	�
18.00	M12 x 1.75	M12 x 1.75	M12 x 1.75	�
21.00	M14 x 2	M14 x 2	M14 x 2	M12 x 1.75
24.00	M16 x 2	M16 x 2	M16 x 2	M14 x 2
27.00	�	�	�	M16 x 2
30.00	M20 x 2.5	M20 x 2.5	M20 x 2.5	�
34.00	�	�	�	M20 x 2.5
36.00	M24 x 3	M24 x 3	M24 x 3	M22 x 2.5
41.00	�	�	�	M24 x 3
46.00	M30 x 3.5	M30 x 3.5	M30 x 3.5	M27 x 3
50.00	�	�	�	M30 x 3.5
55.00	M36 x 4	M36 x 4	M36 x 4	�
60.00	�	�	�	M36 x 4
65.00	�	�	�	�
70.00	�	�	�	M42 x 4.5
75.00	�	�	�	�
80.00	�	�	�	M48 x 5
85.00	�	�	�	�
90.00	�	�	�	M56 x 5.5
95.00	�	�	�	�
100.00	�	�	�	M64 x 6
105.00	�	�	�	�
110.00	�	�	�	M72 x 6
115.00	�	�	�	�
120.00	�	�	�	M80 x 6
130.00	�	�	�	�
135.00	�	�	�	M90 x 6
145.00	�	�	�	�
150.00	�	�	�	M100 x 6

Metric Wrench Sizing Chart for Bolts

STANDARD WRENCH SIZING CHART

Nominal Opening of Proto Wrenches or Sockets in Inches to Fit Standard Bolt Heads and Screw Heads

WRENCH OR SOCKET SIZE		SQUARE AND HEX BOLTS, CAP SCREWS & SQUARE & HEX LAG SCREWS	HEAVY HEX BOLTS & SCREWS	HEX FLANGE SCREWS	TAPPING SCREWS	HEX WASHER HEAD TAPPING SCREWS	HEX HEAD MACHINE SCREWS	HEX WASHER HEAD MACHINE SCREWS	SQUARE HEAD SET SCREWS
ACROSS FLATS	DECIMAL EQUIV.	SQUARE AND HEX BOLTS, CAP SCREWS & SQUARE & HEX LAG SCREWS	HEAVY HEX BOLTS & SCREWS	HEX FLANGE SCREWS	TAPPING SCREWS	HEX WASHER HEAD TAPPING SCREWS	HEX HEAD MACHINE SCREWS	HEX WASHER HEAD MACHINE SCREWS	SQUARE HEAD SET SCREWS
1/8	0.1250	�	�	�	#1&2	#2&3	#1&2	#2&3	�
5/32	0.1562	�	�	�	�	�	�	�	�
3/16	0.1875	�	�	�	#3,4,5	#4&5	#3,4,5	#4&5	#10
1/4	0.2500	�	�	�	#6,7,8	#6,7,8	#6&8	#6&8	1/4
9/32	0.2812	#10	�	�	�	�	�	�	�
5/16	0.3125	�	�	�	#10&12	#10&12	#10&12	#10&12	5/16
11/32	0.3438	�	�	�	�	�	�	�	�
3/8	0.3750	1/4	�	1/4	1/4	1/4	1/4	1/4	3/8
7/16	0.4375	1/4	�	�	�	�	�	�	7/16
1/2	0.5000	5/16	�	5/16	5/16	5/16	5/16	5/16	1/2
9/16	0.5625	3/8	�	3/8	3/8	3/8	3/8	3/8	9/16
5/8	0.6250	7/16	�	7/16	�	�	�	�	5/8
11/16	0.6875	�	�	�	�	�	�	�	�
3/4	0.7500	1/2	�	1/2	�	�	�	�	3/4
13/16	0.8125	9/16	�	9/16	�	�	�	�	�
7/8	0.8750	�	1/2	�	�	�	�	�	7/8
15/16	0.9375	5/8	�	5/8	�	�	�	�	�
1	1.0000	�	�	�	�	�	�	�	1
1 1/16	1.0625	�	5/8	�	�	�	�	�	�
1 1/8	1.1250	3/4	�	3/4	�	�	�	�	1 1/8
1 1/4	1.2500	�	3/4	�	�	�	�	�	1 1/4
1 5/16	1.3125	7/8	�	�	�	�	�	�	�
1 3/8	1.3750	�	�	�	�	�	�	�	1 3/8
1 7/16	1.4375	�	7/8	�	�	�	�	�	�
1 1/2	1.5000	1	�	�	�	�	�	�	1 1/2
1 5/8	1.6250	�	1	�	�	�	�	�	�
1 11/16	1.6875	1 1/8	�	�	�	�	�	�	�
1 13/16	1.8125	�	1 1/8	�	�	�	�	�	�
1 7/8	1.8750	1 1/4	�	�	�	�	�	�	�
2	2.0000	�	1 1/4	�	�	�	�	�	�
2 1/16	2.0625	1 3/8	�	�	�	�	�	�	�
2 3/16	2.1875	�	1 3/8	�	�	�	�	�	�
2 1/4	2.2500	1 1/2	�	�	�	�	�	�	�
2 3/8	2.3750	�	1 1/2	�	�	�	�	�	�
2 7/16	2.4375	1 5/8	�	�	�	�	�	�	�
2 9/16	2.5625	�	1 5/8	�	�	�	�	�	�
2 5/8	2.6250	1 3/4	�	�	�	�	�	�	�
2 3/4	2.7500	�	1 3/4	�	�	�	�	�	�
2 13/16	2.8125	1 7/8	�	�	�	�	�	�	�
2 15/16	2.9375	�	1 7/8	�	�	�	�	�	�
3	3.0000	2	�	�	�	�	�	�	�
3 1/8	3.1250	�	2	�	�	�	�	�	�
3 3/8	3.3750	2 1/4	�	�	�	�	�	�	�
3 1/2	3.5000	�	2 1/4	�	�	�	�	�	�
3 3/4	3.7500	2 1/2	�	�	�	�	�	�	�
3 7/8	3.8750	�	2 1/2	�	�	�	�	�	�
4 1/8	4.1250	2 3/4	�	�	�	�	�	�	�
4 1/4	4.2500	�	2 3/4	�	�	�	�	�	�
4 1/2	4.5000	3	�	�	�	�	�	�	�
4 5/8	4.6250	�	3	�	�	�	�	�	�
4 7/8	4.8750	3 1/4	�	�	�	�	�	�	�
5	5.0000	�	3 1/4	�	�	�	�	�	�
5 1/4	5.2500	3 1/2	�	�	�	�	�	�	�
5 3/8	5.3750	�	3 1/2	�	�	�	�	�	�
5 5/8	5.6250	3 3/4	�	�	�	�	�	�	�
5 3/4	5.7500	�	3 3/4	�	�	�	�	�	�
6	6.0000	4	�	�	�	�	�	�	�
6 1/8	6.1250	�	4	�	�	�	�	�	�
6 1/2	6.5000	�	4 1/4	�	�	�	�	�	�
6 7/8	6.8750	�	4 1/2	�	�	�	�	�	�
7 1/4	7.2500	�	4 3/4	�	�	�	�	�	�
7 5/8	7.6250	�	5	�	�	�	�	�	�
8	8.0000	�	5 1/4	�	�	�	�	�	�
8 3/8	8.3750	�	5 1/2	�	�	�	�	�	�
8 3/4	8.7500	�	5 3/4	�	�	�	�	�	�
9 1/8	9.1250	�	6	�	�	�	�	�	�