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Reference >>Imperial Tap Drill Chart

Imperial Tap Drill Chart

March 25, 2012, 2:31 pm

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Eldar Gerfanov (Admin)

March 25, 2012, 2:31 pm

November 26, 2021, 12:18 am

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by Eldar Gerfanov (Admin)

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Thu November 21, 2024, 5:24 am

Thu November 21, 2024, 5:24 am
icon_drill.png

No or Dia. TPI Min. Dia. Maj. Dia. Drill Size Decimal Clear Hole Decimal
No or Dia. TPI Min. Dia. Maj. Dia. Drill Size Decimal Clear Hole Decimal
0 80 .0447 .0600 3/64 .0469 50 .0700
1 64 .0538 .0730  53 .0595 46 .0810
72 .0560 53 .0595
2 56 .0641 .0860  50 .0700 41 .0960
64 .0668 50 .0700
3 48 .0734 .0990  47 .0785 35 .1100
56 .0771 45 .0820
4 40 .0813 .1120  43 .0890 30 .1285
48 .0864 42 .0935
5 40 .0943 .1250  38 .1015 29 .1360
44 .0971 37 .1040
6 32 .0997 .1380  36 .1065 25 .1495
40 .1073 33 .1130
8 32 .1257 .1640  29 .1360 16 .1770
36 .1299 29 .1360
10 24 .1389 .1900  25 .1495 7 .2010
32 .1517 21 .1590
12 24 .1649 .2160   16 .1770 1 .2280
28 .1722 14 .1820
32 .1777 13 .1850
1/4 20 .1887 .2500   7 .2010 H .2660
28 .2062 3 .2130
32 .2117 7/32 .2188
5/16 18 .2443 .3125   F .2570 Q .3320
24 .2614 I .2720
32 .2742 9/32 .2812
3/8 16 .2983 .3750   5/16 .3125 X .3970
24 .3239 Q .3320
32 .3367 11/32 .3438
7/16 14 .3499 .4375   U .3680 15/32 .4687
20 .3762 25/64 .3906
28 .3937 Y .4040
1/2 13 .4056 .5000   27/64 .4219 17/32 .5312
20 .4387 29/64 .4531
28 .4562 15/32 .4688
9/16 12 .4603 .5625   31/64 .4844 19/32 .5938
18 .4943 33/64 .5156
24 .5114 33/64 .5156
5/8 11 .5135 .6250   17/32 .5312 21/32 .6562
18 .5568 37/64 .5781
24 .5739 37/64 .5781
11/16 24 .6364 .6875 41/64 .6406 23/32 .7188
3/4 10 .6273 .7500   21/32 .6562 25/32 .7812
16 .6733 11/16 .6875
20 .6887 45/64 .7031
1-3/16 20 .7512 .8125 49/64 .7656 27/32 .8438
7/8 9 .7387 .8750   49/64 .7656 29/32 .9062
14 .7874 13/16 .8125
20 .8137 53/64 .8281
15/16 20 .8762 .9375 57/64 .8906 31/32 .9688
1 8 .8466 1.000   7/8 .8750 1-1/32 1.0313
12 .8978 15/16 .9375
20 .9387 61/64 .9531
1-1/16 18 .9943 1.0625 1.000 1.000 1-3/32 1.0938
1-1/8 7 .9497 1.1250   63/64 .9844 1-5/32 1.1562
12 1.0228 1-3/64 1.0469
18 1.0568 1-1/16 1.0625
1-3/16 18 1.1193 1.1875 1-1/8 1.1250 1-7/32 1.2188
1-1/4 7 1.0747 1.2500   1-7/64 1.1094 1-9/32 1.2812
12 1.1478 1-11/64 1.1719
18 1.1818 1-3/16 1.1875
1-5/16 18 1.2443 1.3125 1-1/4 1.2500 1-11/32 1.3438
1-3/8 6 1.1705 1.3750   1-7/32 1.2187 1-13/32 1.4062
12 1.2728 1-19/64 1.2969
18 1.3068 1-5/16 1.3125
1-7/16 18 1.3693 1.4375 1-3/8 1.3750 1-15/32 1.4688
1-1/2 6 1.2955 1.500   1-11/32 1.3437 1-17/32 1.5312
12 1.3978 1-27/64 1.4219
18 1.4318 1-7/16 1.4375
1-9/16 18 1.4943 1.5625 1-12 1.500 1-19/32 1.5938
1-5/8 18 1.5568 1.625 1-9/16 1.5625 1-21/32 1.6562
1-11/16 18 1.6193 1.6875 1-5/8 1.6250 1-23/32 1.7188
1-3/4 5 1.5046 1.750 1-9/16 1.5625 1-25/32 1.7812

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