Tap Drill Sizes |
CUT THREADS
Inch: |
Actual |
|
Major Dia. |
|
1.299 x % of Thread |
|
Probable |
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= |
- |
- |
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Pitch (# of Threads per Inch) |
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Metric: |
Actual |
|
Major Dia. |
|
1.299 x % of Thread x Pitch (mm) |
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Probable |
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= |
- |
- |
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25.4 |
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ROLL FORM THREADS
Inch: |
Actual |
|
Major Dia. |
|
0.680 x % of Thread |
|
Probable |
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= |
- |
- |
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Pitch (# of Threads per Inch) |
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Metric: |
Actual |
|
Major Dia. |
|
1.299 x % of Thread x Pitch (mm) |
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Probable |
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= |
- |
- |
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25.4 |
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When you know the hole size and you want to know what % of thread you are producing:
Inch: |
% of |
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Major Dia. |
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Major Dia. |
- |
Actual |
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Pitch |
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= |
- |
x |
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Pitch (# of Threads per Inch) |
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Metric: |
% of |
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Major Dia. |
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Major Dia. |
- |
Actual |
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= |
- |
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25.4 |
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TAP SIZE |
" B " |
" B " |
Unified 3B Cut Tap |
Unified 2B Cut Tap |
Mil-S-8879 Cut Tap |
Inch
|
Metric 6H Cut Tap |
Metric
|
0 - 80 |
.0600 |
- |
.0465-.0514 |
.0465 - .0514 |
.0479 - .0511 |
.0546 - .0558 |
- |
- |
M1.6 x 0.35 |
.0629 |
1.6mm |
- |
- |
- |
- |
.0480 - .0520 |
.0561 - .0578 |
1 - 64 |
.0730 |
- |
.0561 - .0623 |
.0561 - .0623 |
.0578 - .0619 |
.0660 - .0680 |
- |
- |
1 - 72 |
.0730 |
- |
.0580 - .0635 |
.0580 - .0635 |
.0595 - .0631 |
.0670 - .0690 |
- |
- |
M2 x 0.4 |
.0787 |
2.0mm |
- |
- |
- |
- |
.0616 - .0661 |
.0709 - .0728 |
2 - 56 |
.0860 |
- |
.0667 - .0737 |
.0667 - .0737 |
.0686 - .0732 |
.0780 - .0800 |
- |
- |
2 - 64 |
.0860 |
- |
.0691 - .0753 |
.0691 - .0753 |
.0708 - .0749 |
.0790 - .0810 |
- |
- |
M2.5 x 0.45 |
.0984 |
2.5mm |
- |
- |
- |
- |
.0792 - .0841 |
.0896 - .0918 |
3 - 48 |
.0990 |
- |
.0764 - .0845 |
.0764 - .0845 |
.0900 - .0920 |
.0900 - .0920 |
- |
- |
3 - 56 |
.0990 |
- |
.0797 - .0845 |
.0797 - .0855 |
.0910 - .0930 |
.0910 - .0930 |
- |
- |
4 - 40 |
.1120 |
- |
.0849 - .0939 |
.0849 - .0939 |
.1000 - .1030 |
.1000 - .1030 |
- |
- |
4 - 48 |
.1120 |
- |
.0894 - .0968 |
.0890 - .0968 |
.1030 - .1050 |
.1030 - .1050 |
- |
- |
M3 x 0.5 |
.1181 |
3.0mm |
- |
- |
- |
- |
.0968 - .1023 |
.1087 - .1107 |
5 - 40 |
.1250 |
- |
.0979 - .1062 |
.0979 - .1062 |
.1130 - .1160 |
.1130 - .1160 |
- |
- |
M 3.5 x 0.6 |
.1378 |
3.5mm |
- |
- |
- |
- |
.1122 - .1185 |
.1260 - .1289 |
6 - 32 |
.1380 |
- |
.1040 -.1140 |
.1040 - .1140 |
.1240 - .1260 |
.1240 - .1260 |
- |
- |
6 - 40 |
.1380 |
- |
.1110 - .1186 |
.1110 - .1190 |
.1260 - .1280 |
.1260 - .1280 |
- |
- |
M4 x 0.7 |
.1574 |
4.0 mm |
- |
- |
- |
- |
.1276 - .1347 |
.1437 - .1471 |
8 - 32 |
.1640 |
- |
.1300 - .1389 |
.1300 - .1390 |
.1336 - .1417 |
.1490 - .1520 |
- |
- |
8 - 36 |
.1640 |
- |
.1340 - .1416 |
.1340 - .1420 |
.1370 - .1442 |
.1510 - .1530 |
- |
- |
10 - 24 |
.1900 |
- |
.1450 - .1555 |
.1450 - .1560 |
.1494 - .1600 |
.1700 - .1740 |
- |
- |
10 - 32 |
.1900 |
- |
.1560 - .1641 |
.1560 - .1640 |
.1596 - .1675 |
.1750 - .1780 |
- |
- |
M5 x 0.8 |
.1968 |
5.0 mm |
- |
- |
- |
- |
.1627 - .1706 |
.1811 - .1850 |
M6 x 1.0 |
.2362 |
6.0 mm |
- |
- |
- |
- |
.1935 - .2028 |
.2165 - .2215 |
M6 x 0.75 |
.2362 |
6.0 mm |
- |
- |
- |
- |
.2042 - .2117 |
- |
1/4 - 20 |
.2500 |
- |
.1960 - .2067 |
.1960 - .2070 |
.2013 - .2121 |
.2250 - .2300 |
- |
- |
1/4 - 28 |
.2500 |
- |
.2110 - .2190 |
.2110 - .2200 |
.2152 - .2229 |
.2330 - .2370 |
- |
- |
5/16 - 18 |
.3125 |
- |
.2520 - .2630 |
.2520 - .2650 |
.2584 - .2690 |
.2850 - .2910 |
- |
- |
5/16 - 24 |
.3125 |
- |
.2670 - .2754 |
.2670 - .2770 |
.2719 - .2799 |
.2920 - .2970 |
- |
- |
M8 x 1.25 |
.3149 |
8.0mm |
- |
- |
- |
- |
.2616 - .2721 |
.2904 - .2965 |
M8 x 1.0 |
.3149 |
8.0mm |
- |
- |
- |
- |
.2723 -.2816 |
.2927 - .2725 |
3/8 - 16 |
.3750 |
- |
.3070 - .3128 |
.3070 - .3210 |
.3192 - .3251 |
.3440 - .3500 |
- |
- |
3/8 - 24 |
.3750 |
- |
.3300 - .3372 |
.3300 - .3400 |
.3344 - .3418 |
.3550 - .3590 |
- |
- |
M10 x 1.5 |
.3937 |
10.0mm |
- |
- |
- |
- |
.3297 - .3415 |
.3642 - .3716 |
M10 x 1.25 |
.3937 |
10.0mm |
- |
- |
- |
- |
.3404 - .3508 |
.3658 - .3712 |
7/16 - 14 |
.4375 |
- |
.3600 - .3717 |
.3600 - .3760 |
.3680 - .3795 |
.4020 - .4090 |
- |
- |
7/16 - 20 |
.4375 |
- |
.3830 - .3916 |
.3830 - .3950 |
.3888 - .3970 |
.4140 - .4180 |
- |
- |
M12 x 1.75 |
.4724 |
12.0 mm |
- |
- |
- |
- |
.3978 - .4110 |
.4380 - .4466 |
M12 x 1.25 |
.4724 |
12.0mm |
- |
- |
- |
- |
.4192 - .4295 |
.4445 - .4499 |
1/2 - 13 |
.5000 |
- |
.4170 - .4284 |
.4170 - .4340 |
.4251 - .4368 |
.4620 - .4700 |
- |
- |
1/2 - 20 |
.5000 |
- |
.4460 - .4537 |
.4460 - .4570 |
.4513 - .4591 |
.4750 - .4800 |
- |
- |
M14 x 2.0 |
.5511 |
14.0mm |
- |
- |
- |
- |
.4659 - .4807 |
.5118 - .5217 |
M14 x 1.5 |
.5511 |
14.0mm |
- |
- |
- |
- |
.4872 - .4990 |
.5177 - .5239 |
9/16 - 12 |
.5625 |
- |
.4720 - .4843 |
.4720 - .4900 |
.4814 - .4914 |
.5200 - .5280 |
- |
- |
9/16 - 18 |
.5625 |
- |
.5020 - .5106 |
.5020 - .5150 |
.5084 - .5156 |
.5350 - .5400 |
- |
- |
5/8 - 11 |
.6250 |
- |
.5270 - .5391 |
.5270 - .5460 |
.5365 - .5474 |
.5790 - .5860 |
- |
- |
5/8 - 18 |
.6250 |
- |
.5650 - .5730 |
.5650 - .5780 |
.5709 - .5788 |
.5980 - .6030 |
- |
- |
M16 x 2.0 |
.6299 |
16. mm |
- |
- |
- |
- |
.5446 - .5594 |
.5906 - .6004 |
M16 x 1.5 |
.6299 |
16.0mm |
- |
- |
- |
- |
.5659 - .5778 |
.5964 - .5239 |
3/4 - 10 |
.7500 |
- |
.6450 - .6545 |
.6420 - .6630 |
.6526 - .6646 |
.7000 - .7090 |
- |
- |
3/4 - 16 |
.7500 |
- |
.6820 - .6908 |
.6820 - .6960 |
.6892 - .6977 |
.7200 - .7260 |
- |
- |
M20 x 2.5 |
.7874 |
20.0mm |
- |
- |
- |
- |
.6808 - .6985 |
.7382 - .7505 |
M20 x 1.5 |
.7874 |
20.0mm |
- |
- |
- |
- |
.7234 - .7352 |
.7539 - .7601 |
7/8 - 9 |
.8750 |
- |
.7550 - .7681 |
.7550 - .7780 |
.7668 - .7801 |
.8180 - .8290 |
- |
- |
7/8 - 14 |
.8750 |
- |
.7980 - .8068 |
.7980 - .8140 |
.8055 - .8152 |
.8390 - .8450 |
- |
- |
M24 x 3.0 |
.9448 |
24.0mm |
- |
- |
- |
- |
.8170 - .8366 |
.8858 - .9006 |
M24 x 2.0 |
.9448 |
24.0mm |
- |
- |
- |
- |
.8596 - .8744 |
- |
1" - 8 |
1.0000 |
- |
.8650 - .8797 |
.8650 - .8900 |
.8783 - .8933 |
.9350 - .9480 |
- |
- |
1" - 12 |
1.0000 |
- |
.9100 - .9198 |
.9100 - .9280 |
.9189 - .9298 |
.9590 - .9670 |
- |
- |