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SECTION 2: DIRECTORY OF GENERAL INFORMATION
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WEIGHTS OF TYPES A, AB & B TAPPING SCREWS - lbs per 1M screws
Screw Length (in.) Screw Size
2 3 4 5 6 8 12 14
3/16 0.4 0.6
1/4 0.5 0.7 1.0 1.3 1.4 2.4
5/16 0.6 0.8 1.1 1.4 1.7 2.6
3/8 0.7 0.9 1.2 1.6 1.9 2.8 5.7
1/2 0.8 1.0 1.4 1.9 2.2 3.3 6.6 9.4
5/8 0.9 1.2 1.6 2.2 2.5 3.8 7.3 10.5
3/4 1.0 1.4 1.9 2.4 2.9 4.2 8.1 11.5
7/8 2.1 2.7 3.2 4.7 8.9 12.6
1 2.3 3.0 3.6 5.2 9.7 13.7
1-1/4 3.6 4.3 6.2 11.5 15.9
1-1/2 4.2 5.0 7.2 13.2 18.1
1-3/4 5.7 8.1 14.8 20.4

2

 9.0 16.4 22.5
2-1/4 18.1 24.7
2-1/2 19.8 26.9
2-3/4 21.4 29.1

3

 23.0 31.3
NOTE: Weights are approximations and may vary.
METRIC CONVERSION CHART
Frac. (in.) Dec. (in.) mm   Frac. (in.) Dec. (in.) mm
1/64 0.015625 0.3969 33/64 0.515625 13.0969
1/32 0.031250 0.7938 17/32 0.531250 13.4938
3/64 0.046875 1.1906 35/64 0.546875 13.8906
1/16 0.062500 1.5875 9/16 0.562500 14.2875
5/64 0.078125 1.9844 37/64 0.578125 14.6844
3/32 0.093750 2.3812 19/32 0.593750 15.0813
7/64 0.109375 2.7781 39/64 0.609375 15.4781
1/8 0.125000 3.1750 5/8 0.625000 15.8750
9/64 0.140625 3.5719 41/64 0.640625 16.2719
5/32 0.156250 3.9688 21/32 0.656250 16.6688
11/64 0.171875 4.3656 43/64 0.671875 17.0656
3/16 0.187500 4.7625 11/16 0.687500 17.4625
13/64 0.203125 5.1594 45/64 0.703125 17.8594
7/32 0.218750 5.5563 23/32 0.718750 18.2563
15/64 0.234375 5.9531 47/64 0.734375 18.6531
1/4 0.250000 6.3500 3/4 0.750000 19.0500
17/64 0.265625 6.7469 49/64 0.765625 19.4469
9/32 0.281250 7.1438 25/32 0.781250 19.8437
19/64 0.296875 7.5406 51/64 0.796875 20.2406
5/16 0.312500 7.9375 13/16 0.812500 20.6375
21/64 0.328125 8.3344 53/64 0.828125 21.0344
11/32 0.343750 8.7312 27/32 0.843750 21.4312
23/64 0.359375 9.1281 55/64 0.859375 21.8281
3/8 0.375000 9.5250 7/8 0.875000 22.2250
25/64 0.390625 9.9219 57/64 0.890625 22.6219
13/32 0.406250 10.3188 29/32 0.906250 23.0188
27/64 0.421875 10.7156 59/64 0.921875 23.4156
7/16 0.437500 11.1125 15/16 0.937500 23.8125
29/64 0.453125 11.5094 61/64 0.953125 24.2094
15/32 0.468750 11.9062 31/32 0.968750 24.6062
31/64 0.484375 12.3031 63/64 0.984375 25.0031
1/2 0.500000 12.7000 1 1.000000 25.4000

Copyright 2001, Compass International, Inc.