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Fillable Printable Standard Tap Drill Chart

Fillable Printable Standard Tap Drill Chart

Standard Tap Drill Chart

Standard Tap Drill Chart

Tap Drill Chart
129
Tap Drill Chart (Standard 2B)
Nominal
Pipe Tap
Size
NPT & NPTF
w/o Reamer w/Reamer
1/16-27 CA
1/8-27 Q 21/64
1/4-18 7/16 27/64
3/8-18 9/16 9/16
1/2-14 45/64 11/16
3/4-14 29/32 57/64
1 - 11
1
/
2
1
9
/
64
1
1
/
8
1
1
/
4
-
11
1
/
2
1
31
/
64
1
15
/
32
1
1
/
2
-
11
1
/
2
1
23
/
32
1
45
/
64
2
-
11
1
/
2
2
3
/
16
2
11
/
64
Pipe Tap Drill Chart
Nominal
Pipe Tap
Size
NPSM NPSC NPSF
1/16-27 - 1/4 D
1/8-27 TQ R
1/4-18 15/32 7/16 7/16
3/8-18 .603 37/64 37/64
1/2-14 19.0MM 45/64 45/64
3/4-14 61/64 59/64 59/64
1 - 11
1
/
2
1
13
/
64
1
5
/
32
1
5
/
32
1
1
/
4
-
11
1
/
2
1
35
/
64
1
1
/
2
-
1
1
/
2
-
11
1
/
2
1
25
/
32
1
47
/
64
-
2
-
11
1
/
2
2
1
/
4
2
13
/
64
-
Tap Drill Chart (Metric H6)
Tap Size Cut Tap Drill Roll Tap Drill Minor Ø Major Ø
0-80 3/64 .0469 1.35mm .0531 .0465/.0514 .060
1-72 #53 .0595 1.7mm .0669 .0580/.0635 .073
1-64 #53 .0595 1.65mm .0650 .0561/.0623 .073
2-64 #50 .070 2.0mm .0787 .0691/.0753 .086
2-56 #50 .070 5/64 .0781 .0667/.0737 .086
3-48 #47 .0785 #43 .089 .0764/.0845 .099
3-56 #45 .0820 2.3mm .0906 .0797/.0865 .099
4-40 #43 .0890 #39 .0995 .0849/.0939 .112
4-48 #42 .0935 2.6mm .1024 .0894/.0968 .112
5-40 #38 .1015 #33 .1130 .0979/.1062 .125
5-44 #37 .1040 2.9mm .1142 .1004/.1079 .125
6-32 #36 .1065 3.1mm .1220 .104/.114 .138
6-40 #33 .1130 3.2mm .1260 .111/.119 .138
8-36 #29 .1360 #26 .1520 .134/.142 .164
8-32 #29 .1360 #25 .1495 .130/.139 .164
10-24 #25 .1495 11/64 .1719 .145/.156 .190
10-32 #21 .1590 #16 .1770 .156/.164 .190
12-24 #16 .1770 5.0mm .1968 .171/.181 .216
12-28 #14 .1820 #8 .1990 .177/.186 .216
12-32 3/16 .1875 * * .182/.190 .216
1/4-20 #7 .2010 #1 .2280 .196/.207 .250
1/4-28 #3 .2130 A .2340 .211/.220 .250
1/4-32 7/32 .2188 * * .216/.224 .250
5/16-18 F .2570 L .2880 .252/.265 .312
5/16-24 I .2720 M .2950 .267/.277 .312
5/16-32 9/32 .2813 * * .279/.286 .312
3/8-16 5/16 .3120 S .3480 .307/.321 .375
3/8-24 Q .3320 T .3580 .330/.340 .375
3/8-32 11/32 .3438 * * .341/.349 .375
Tap Size Cut Tap Drill Roll Tap Drill Minor Ø Major Ø
M1.6 x .35 1.25 .0492 1.45 .0571 1.221/1.321 .0481/.0520 1.6 .0630
M1.8 x .35 1.45 .0571 #51 .0670 1.371/1.421 .0540/.0559 1.8 .0709
M2 x .4 1.6 .0630 1.8 .0709 1.567/1.679 .0620/.0661 2.0 .0787
M2.2 x .45 1.75 .0689 2.0 .0787 1.648/1.713 .0649/.0674 2.2 .0866
M2.5 x .45 2.05 .0807 2.3 .0906 2.013/2.138 .0793/.0842 2.5 .0984
M3 x .5 2.5 .0984 7/64 .1094 2.459/2.599 .0968/.1023 3.0 .1181
M3.5 x .6 2.9 .1142 3.2 .1260 2.850/3.010 .1122/.1185 3.5 .1378
M4 x .7 3.3 .1299 3.7 .1457 3.242/3.422 .1276/.1347 4.0 .1575
M4.5 x .75 3.7 .1457 4.1 .1614 3.580/3.688 .1406/.1452 4.5 .1772
M5 x .8 4.2 .1654 #14 .182 4.134/4.334 .1628/.1706 5.0 .1969
M6 x 1.0 5.0 .1969 7/32 .2188 4.917/5.153 .1936/.2029 6.0 .2362
M7 x 1.0 6.0 .2362 F .2570 5.773/5.917 .2273/.2330 7.0 .2756
M8 x 1.25 6.7
.2638 7.4 .2913 6.647/6.912 .2617/.2721 8.0 .3150
M8 x 1.0 7.0 .2756 19/64 .2969 6.917/7.153 .2723/.2816 8.0 .3150
M10 x 1.5 8.5 .3346 U .3680 8.376/8.676 .3298/.3416 10.0 .3937
M10 x 1.25 8.7 .3425 9.4 .3701 8.647/8.912 .3404/.3509 10.0 .3937
M12 x 1.75 10.2 .4016 11.2 .4409 10.106/10.441 .3979/.4111 12.0 .4724
M12 x 1.25 10.8 .4252 11.5 .4528 10.647/10.912 .4192/.4296 14.0 .5512
M14 x 2.0 12.0 .4724 33/64 .5156 11.835/12.210 .4659/.4807 16.0 .6299
M16 x 2.0 14.0 .5512 19/32 .5938 13.835/14.210 .5447/.5594 18.0 .7087
M16 x 1.5 14.5 .5709 15.25 .6004 14.376/14.676 .5660/.5778 18.0 .7087
M18 x 2.5 15.5 .6102 39/64 .6094 14.933/15.394 .5879/.6061 18.0 .7087
M18 x 1.5 16.5 .6496 17.25 .6791 16.376/16.676 .6447/.6565 20.0 .7874
M20 x 2.5 17.5 .6890 18.75 .7382 17.294/17.744 .6809/.6986 20.0 .7874
M20 x 1.5 18.5 .7283 19.25 .7579 18.376/18.676 .7235/.7353 20.0 .7874
M22 x 2.5 19.5 .7677 * * 19.294/19.744
.7596/.7773 22.0 .8661
M22 x 1.5 20.5 .8071 * * 20.376/20.676 .8022/.8140 22.0 .8661
M24 x 3.0 21.0 .8268 * * 20.752/21.252 .8170/.8367 24.0 .9449
M24 x 2.0 22.0 .8661 * * 21.835/22.210 .8596/.8744 24.0 .9449
M27 x 3.0 24.0 .9449 * * 23.752/24.252 .9351/.9548 27.0 1.0630
M27 x 2.0 25.0 .9843 * * 24.835/25.210 .9778/.9925 27.0 1.0630
M30 x 3.5 26.5 1.0433 * * 26.211/26.771 1.0319/1.0540 30.0 1.1811
M30 x 2.0 28.0 1.1024 * * 27.835/28.210 1.0959/1.1106 30.0 1.1811
M33 x 3.5 29.5 1.1614 * * 28.706/29.211 1.1302/1.1500 33.0 1.2992
M33 x 2.0 31.0 1.2205 * * 30.835/31.210 1.2140/1.2287 33.0 1.2992
M36 x 4.0 32.0 1.2598 * * 31.670/32.270 1.2469/1.2705 36.0 1.4173
M36 x 3.0 33.0 1.2992 * * 31.093/31.670 1.2241/1.2469 36.0 1.4173
M39 x 4.0 35.0 1.3780 * * 34.093/34.670 1.3422/1.3650 39.0 1.5354
M39 x 3.0 36.0 1.4173 * * 35.319/35.752 1.3905/1.4076 39.0 1.5354
Tap Size Cut Tap Drill Roll Tap Drill Minor Ø Major Ø
7/16-14 U .3680 13/32 .4062 .360/.380 .437
7/16-20 25/64 .3906 Z .4130 .383/.395 .437
7/16-28 Y .4040 * * .299/.407 .437
1/2-13 27/64 .4219 15/32 .4688 .417/.434 .500
1/2-20 29/64 .4531 12.25mm .4823 .446/.457 .500
1/2-28 15/32 .4688 * * .461/.470 .500
9/16-12 31/64 .4844 17/32 .5312 .472/.490 .562
9/16-18 1/2 .500 13.5mm .5315 .502/.515 .562
9/16-24 33/64 .5156 * * .517/.527 .562
5/8-11 17/32 .5313 14.75mm .5807 .527/.546 .625
5/8-18 9/16 .5625 15.25mm .6004 .565/.578 .625
5/8-24 37/64 .5781 * * .580/.590 .625
11/16-12 39/64 .6094 * * .597/.615 .687
11/16-24 41/64 .6406 * * .642/.652 .687
3/4-10 21/32 .6563 45/64 .7031 .642/.663 .750
3/4-16 11/16 .6875 23/32 .7188 .682/.696 .750
3/4-20 45/64 .7031 * * .696/.707 .750
13/16-12 47/64 .7344 * * .722/.740 .812
13/16-16 3/4 .750 * * .745/.759 .812
13/16-20 49/64 .7656 * * .758/.770 .812
7/8-9 49/64 .7656 * * .755/.778 .875
7/8-14 51/64 .7969 * * .798/.814 .875
7/8-20 53/64 .8281 * * .821/.832 .875
15/16-12 55/64 .8594 * * .847/.865 .937
15/16-16 7/8 .8750 * * .870/.884 .937
15/16-20 57/64 .8906 * * .883/.895 .937
1 - 8 7/8 .8750 * * .865/.890 1
1 - 12 59/64 .9219 * * .910/.928 1
1 - 20 61/64 .9531 * * .946/.957 1
Italics = Metric
* - Form Tap not available or not standard. Check
with Tap Manufacturer for required Drill Size.
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