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These
handy reference charts might save you a little time around the shop.
Click here for a free printable PDF. Or simply
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A division
of The Steco Corporation
P.O. Box 2238
Little
Rock, Arkansas 72203 USA
1-800-643-8026
Fax 501-374-4278
Contact
A division of
The Steco Corporation
P.O. Box 2238
Little
Rock, Arkansas 72203 USA
1-800-643-8026
Fax 501-374-4278
Contact
| TAP
DRILL SIZES Based on approximately 75% full thread. |
Drill Size 80 79 1/64 78 77 76 75 74 73 72 71 70 69 68 1/32 67 66 65 64 63 62 61 60 59 58 57 56 3/64 55 54 53 1/16 52 51 50 49 48 5/64 47 46 45 44 43 42 3/32 41 40 39 38 37 36 7/64 35 34 33 32 31 1/8 30 29 28 9/64 27 26 25 24 23 5/32 22 21 20 19 18 11/64 17 16 15 14 13 3/16 12 11 10 9 8 7 13/64 6 5 4 3 7/32 2 1 A 15/64 B C D 1/4 E F G 17/64 H I J K 9/32 L M 19/64 N 5/16 O P 21/64 Q R 11/32 S T 23/64 U 3/8 V W 25/64 X Y 13/32 Z 27/64 7/16 29/64 15/32 31/64 1/2 33/64 17/32 35/64 9/16 37/64 19/32 39/64 5/8 41/64 21/32 43/64 11/16 45/64 23/32 47/64 3/4 49/64 25/32 51/64 13/16 53/64 27/32 55/64 7/8 57/64 29/32 59/64 15/16 61/64 31/32 63/64 1 |
Decimal Equiv. .0135 .0145 .0156 .0160 .0180 .0200 .0210 .0225 .0240 .0250 .0260 .0280 .0292 .0310 .0313 .0320 .0330 .0350 .0360 .0370 .0380 .0390 .0400 .0410 .0420 .0430 .0465 .0469 .0520 .0550 .0595 .0625 .0635 .0670 .0700 .0730 .0760 .0781 .0785 .0810 .0820 .0860 .0890 .0935 .0938 .0960 .0980 .0995 .1015 .1040 .1065 .1094 .1100 .1110 .1130 .1160 .1200 .1250 .1285 .1360 .1405 .1406 .1440 .1470 .1495 .1520 .1540 .1562 .1570 .1590 .1610 .1660 .1695 .1719 .1730 .1770 .1800 .1820 .1850 .1875 .1890 .1910 .1935 .1960 .1990 .2010 .2031 .2040 .2055 .2090 .2130 .2188 .2210 .2280 .2340 .2344 .2380 .2420 .2460 .2500 .2570 .2610 .2656 .2660 .2720 .2770 .2810 .2812 .2900 .2950 .2969 .3020 .3125 .3160 .3230 .3281 .3320 .3390 .3438 .3480 .3580 .3594 .3680 .3750 .3770 .3860 .3906 .3970 .4040 .4062 .4130 .4219 .4375 .4531 .4688 .4844 .5000 .5156 .5313 .5469 .5625 .5781 .5938 .6094 .6250 .6406 .6562 .6719 .6875 .7031 .7188 .7344 .7500 .7656 .7812 .7969 .8125 .8281 .8438 .8594 .8750 .8906 .9062 .9219 .9375 .9531 .9688 .9844 1.000 |
MM Equiv. .343 .368 .397 .406 .457 .508 .533 .572 .610 .635 .660 .711 .742 .787 .794 .813 .838 .889 .914 .940 .965 .991 1.016 1.041 1.067 1.092 1.181 1.191 1.321 1.397 1.511 1.587 1.613 1.702 1.778 1.854 1.930 1.984 1.994 2.057 2.083 2.184 2.261 2.375 2.380 2.438 2.489 2.527 2.578 2.642 2.705 2.778 2.794 2.819 2.870 2.946 3.048 3.175 3.264 3.454 3.569 3.572 3.658 3.734 3.797 3.861 3.912 3.969 3.988 4.039 4.089 4.216 4.305 4.366 4.394 4.496 4.572 4.623 4.699 4.762 4.801 4.851 4.915 4.978 5.055 5.105 5.159 5.182 5.220 5.309 5.410 5.556 5.613 5.791 5.944 5.953 6.045 6.147 6.248 6.350 6.528 6.629 6.747 6.756 6.909 7.036 7.137 7.144 7.366 7.493 7.541 7.671 7.937 8.026 8.204 8.334 8.433 8.611 8.731 8.839 9.093 9.128 9.347 9.525 9.576 9.804 9.922 10.084 10.262 10.319 10.490 10.716 11.113 11.509 11.906 12.303 12.700 13.097 13.494 13.890 14.287 14.684 15.081 15.478 15.875 16.272 16.669 17.065 17.462 17.859 18.256 18.653 19.050 19.447 19.844 20.240 20.637 21.034 21.431 21.828 22.225 22.622 23.019 23.415 23.812 24.209 24.606 25.003 25.400 |
DECIMAL
EQUIVALENTS Of wire, letter and fractional size drills. |
Thread #0-80 #1-64 #1-72 #2-56 #2-64 #3-48 #3-56 #4-40 #4-48 #5-40 #5-44 #6-32 #6-40 #8-32 #8-36 #10-24 #10-32 #12-24 #12-28 1/4-20 1/4-28 5/16-18 5/16-24 3/8-16 3/8-24 7/16-14 7/16-20 1/2-12 1/2-13 1/2-20 9/16-12 9/16-18 5/8-11 5/8-18 3/4-10 3/4-16 7/8-9 7/8-14 1-8 1-12 1-14 1-1/8-7 1-1/8-12 1-1/4-7 1-1/4-12 1-1/2-6 1-1/2-12 1-3/4-5 1-3/4-12 2-4-1/2 2-12 2-1/4-4-1/2 2-1/2-4 2-3/4-4 3-4 |
Drill 3 /64 No. 53 No. 53 No. 50 No. 50 No. 47 No. 46 No. 43 No. 42 No. 39 No. 37 No. 36 No. 33 No. 29 No. 29 No. 25 No. 21 No. 17 No. 15 No. 7 No. 3 F I 5/16 Q U 25/64 27/64 27/64 29/64 31/64 33/64 17/32 37/64 21/32 11/16 49/64 13/16 7/8 59/64 15/16 63/64 1-3/64 1-7/64 1-11/64 1-11/32 1-27/64 1-35/64 1-43/64 1-25/32 1-59/64 2-1/32 2-1/4 2-1/2 2-3/4 |