Screws

Machine Screws Slotted / Phillips Head Round Head Flat Head Pan Head Self Drilling Screws TEK Type Hex Washer Head Sealing Washers

Sheet Metal Screws Type A/AB Point Flat Head Pan Head Hex Washer Head Drywall & Wood Screws Bugle Head Flat Head Decking

Decimal and Millimeter Equivalents Decimals Millimeters Decimals Millimeters 1/64 0.015625 0.397 17/32 .53125 13.494 1/32 .03125 0.1794 35/64 .546875 13.891 3/64 .046875 1.191 9/16 .5625 14.288 1/16 .0625 1.588 37/64 .578125 14.684 5/64 .078125 1.984 19/32 .59375 15.478 3/32 .09375 2.381 39/64 .509375 15.478 7/64 .109375 2.778 5/8 .6250 15.875 1/8 .1250 3.175 41/64 .640625 16.272 9/64 .140625 3.572 21/32 .65625 16.669 5/32 .15625 3.969 43/64 .671875 17.066 11/64 .171875 4.366 11/18 .6875 17.463 3/16 .1875 4.763 45/64 .703125 17.859 13/64 .203125 5.159 23/32 .71875 18.256 7/32 .21875 5.556 47/64 .73375 18.653 15/64 .234375 5.953 3/4 .7500 19.050 1/4 .2500 6.350 49/64 .765625 19.477 17/64 .265625 6.747 25/32 .78125 19.844 9/32 .28125 7.144 51/64 .796875 20.241 19/64 .296875 7.541 13/16 .8125 20.638 5/16 .3125 7.938 53/64 .828125 21.034 21/64 .328125 8.334 27/34 .84375 21.431 11/32 .34375 8.731 55/64 .859375 21.828 23/64 .359375 9.128 7/8 .8750 22.225 3/8 .3750 9.525 57/64 .890625 22.622 25/64 .390625 9.922 29/64 .90625 23.019 13/32 .40625 10.319 59/64 .921875 23.416 27/64 .421875 10.716 15/16 .9375 23.813 7/16 .4375 11.113 61/64 .953125 24.606 29/64 .453125 11.509 31/32 .96875 24.606 15/32 .46875 11.906 63/64 .984375 25.003 31/64 .484375 12.303 1 1.000 25.400 1/2 .5000 12.700 One mm = .03937 33/64 .515625 13.097

Threads Per Inch Size Coarse UNC Fine UNF Basic Major Diameter 0 64 80 .0600 1 64 72 .0730 2 58 64 .0860 3 48 56 .0990 4 40 48 .1120 5 40 44 .1250 6 32 40 .1380 8 32 36 .1640 10 24 32 .1900 12 24 28 .2160 1/4 20 28 .2500 5/16 18 24 .3750 3/8 16 24 .3125 7/16 14 20 .4375 1/2 13 20 .5000 9/16 12 18 .5625 5/8 11 18 .6250 3/4 10 16 .7500 7/8 9 14 .8750 1 8 14 1.000 1 1/8 7 12 1.125 1 1/4 7 12 1.250 1 3/8 6 12 1.500 1 1/2 6 12 1.500 1 5/8 5 1/2 - 1.625 1 3/4 5 12 1.750 1 7/8 5 - 1.875 2 4 1/2 12 2.00 2 1/4 4 1/2 - 2.250 2 1/2 4 - 2.500 2 3/4 4 - 2.750 3 4 - 3.000 3 1/4 4 - 3.250 3 1/2 4 - 3.500 3 3/4 4 - 3.750 4 4 - 4.000