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Tap Drill Chart – American National Form

/Tap Drill Chart – American National Form
Tap Drill Chart – American National Form 2018-08-14T12:59:55+00:00

Part of the reason for this tap drill chart page is to make it handier for me to find.  I’m going to, over time, put as many charts and tables on the internet as I can. At least the ones I use.  Then when I need to look up something in one of the tables or charts that I know exist, I just go online and to my Chilipepper web site and  presto! The data I need is readily at hand. I hope this chart proves useful to you as well.

 

Tap Drill Chart. Sizes for threads of American National Form

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Tap Drill
 Outside
Dia, Pitch
Root Diameter Size or Number Decimal Equiv.
1/16 – 64 .0422 3/64 .0469
72 .0445 3/64 .0469
5/64 – 60 .0563 1/16 .0625
72 .0601 52 .0635
3/32 – 48 .0667 49 .0730
50 .0678 49 .0730
7/64 – 48 .0823 43 .0890
1/8 – 32 .0844 3/32 .0937
40 .0925 38 .1015
9/64 – 40 .1081 32 .1160
5/32 – 32 .1157 1/8 .1250
36 .1202 30 .1285
11/64 – 32 .1313 9/64 .1406
3/16 – 24 .1334 26 .1470
32 .1467 22 .1570
13/64 – 24 .1490 20 .1610
7/32 – 24 .1646 16 .1770
32 .1782 12 .1890
15/64 – 24 .1806 10 .1935
1/4 – 20 .1850 7 .2010
24 .1959 4 .2090
27 .2019 3 .2130
28 .2036 3 .2130
32 .2094 7/32 .2187
5/16 – 18 .2403 F .2570
20 .2476 17/64 .2656
24 .2584 I .2720
27 .2644 J .2770
32 .2719 9/32 .2812
3/8 – 16 .2938 5/16 .3125
20 .3100 21/64 .3281
24 .3209 Q .3320
27 .3269 R .3390
7/16 – 14 .3447 U .3680
20 .3726 25/64 .3906
24 .3834 X .3970
27 .3894 Y .4040
1/2 – 12 .3918 27/64 .4219
13 .4001 27/64 .4219
20 .4351 29/64 .4531
24 .4459 29/64 .4531
27 .4519 15/32 .4687
9/16 – 12 .4542 31/64 .4844
18 .4903 33/64 .5156
27 .5144 17/32 .5312
5/8 – 11 .5069 17/32 .5312
12 .5168 35/64 .5469
18 .5528 37/64 .5781
27 .5769 19/32 .5937
11/16 – 11 .5694 19/32 .5937
16 .6063 5/8 .6250
3/4 – 10 .6201 21/32 .6562
12 .6418 43/64 .6719
16 .6688 11/16 .6875
27 .7019 23/32 .7187
13/16 – 10 .6826 23/32 .7187
7/8 9 .7307 49/64 .7656
12 .7668 51/64 .7969
14 .7822 13/16 .8125
18 .8028 53/64 .8281
27 .8269 27/32 .8437
15/16 – 9 .7932 53/64 .8281
1 – 8 .8376 7/8 .8750
12 .8918 59/64 .9219
14 .9072 15/16 .9375
27 .9519 3132 .9687
1 1/8 – 7 .9394 63/64 .9844
12 1.0168 1-3/64 1.0469
1 1/4 – 7 1.0644 1-7/64 1.1094
12 1.1418 1-11/64 1.1719
1 3/8 – 6 1.1585 1-7/32 1.2187
12 1.2668 1-19/64 1.2969
1 1/2 – 6 1.2835 1-11/32 1.3437
12 1.3918 1-27/64 1.4219
1 5/8 – 5 1/2 1.3888 1-29/64 1.4531
1 3/4 – 5 1.4902 1-9/16 1.5625
1 7/8 – 5 1.6152 1-11/16 1.6875
2 – 4 1/2 1.7113 1-25/32 1.7812
2 1/8 – 4 1/2 1.8363 1-29/32 1.9062
2 1/4 – 4 1/2 1.9613 2-1/32 2.0312
2 3/8 – 4 2.0502 2-1/8 2.1250
2 1/2 – 4 2.1752 2-1/4 2.2500