TAP      Tap Drill      Decimal Drill Size Theo. % of Thread Prob. Over size Prob. Hole Size % of Thread
#0-80 56 .0465 83.00% .0015 .0480 74.00%
  3/64 .0469 81.00% .0015 .0480 71.00%
#1-64 54 .0550 89.00% .0015 .0565 81.00%
  53 .0595 67.00% .0015 .0610 59.00%
#1-72 53 .0595 75.00% .0015 .0610 67.00%
  1/16 .0625 58.00% .0015 .0640 50.00%
#2-56 51 .0670 82.00% .0017 .0687 74.00%
  50 .0700 69.00% .0017 .0717 62.00%
  49 .0730 56.00% .0017 .0747 49.00%
#2-64 50 .0700 79.00% .0017 .0717 70.00%
  49 .0730 64.00% .0017 .0747 56.00%
#3-48 48 .0760 85.00% .0019 .0779 78.00%
  5/64 .0781 77.00% .0019 .0800 70.00%
  47 .0785 76.00% .0019 .0804 69.00%
  46 .0810 67.00% .0019 .0829 60.00%
  45 .0820 63.00% .0019 .0839 56.00%
#3-56 46 .0810 78.00% .0019 .0829 69.00%
  45 .0820 73.00% .0019 .0839 65.00%
  44 .0860 56.00% .0020 .0880 47.00%
#4-40 44 .0860 80.00% .0020 .0880 74.00%
  43 .0890 71.00% .0020 .0910 65.00%
  42 .0935 57.00% .0020 .0955 51.00%
  3/32 .0938 56.00% .0020 .0958 50.00%
#4-48 42 .0935 68.00% .0020 .0955 61.00%
  3/32 .0938 68.00% .0020 .0958 60.00%
  41 .0960 59.00% .0020 .0980 52.00%
#5-40 40 .0980 83.00% .0023 .1003 76.00%
  39 .0995 79.00% .0023 .1018 71.00%
  38 .1015 72.00% .0023 .1038 65.00%
  37 .1040 65.00% .0023 .1063 58.00%
#5-44 38 .1015 79.00% .0023 .1038 72.00%
  37 .1040 71.00% .0023 .1063 63.00%
  36 .1065 63.00% .0023 .1088 55.00%
#6-32 37 .1040 84.00% .0023 .1063 78.00%
  36 .1065 78.00% .0023 .1088 72.00%
  7-64 .1094 70.00% .0026 .1120 64.00%
  35 .1100 69.00% .0026 .1126 63.00%
  34 .1110 67.00% .0026 .1136 60.00%
  33 .1130 62.00% .0026 .1156 55.00%
#6-40 34 .1110 83.00% .0026 .1136 75.00%
  33 .1130 77.00% .0026 .1156 69.00%
  32 .1160 68.00% .0026 .1186 60.00%
#8-32 29 .1360 69.00% .0029 .1389 62.00%
  28 .1405 58.00% .0029 .1434 51.00%
#8-36 29 .1360 78.00% .0029 .1389 70.00%
  28 .1405 68.00% .0029 .1434 57.00%
  9-64 .1406 68.00% .0029 .1435 57.00%
#10-24 27 .1440 85.00% .0032 .1472 79.00%
  26 .1470 79.00% .0032 .1502 74.00%
  25 .1495 75.00% .0032 .1527 69.00%
  24 .1520 70.00% .0032 .1552 64.00%
  23 .1540 67.00% .0032 .1572 61.00%
#10-32 5/32 .1563 83.00% .0032 .1595 75.00%
  22 .1570 81.00% .0032 .1602 73.00%
  21 .1590 76.00% .0032 .1622 68.00%
  20 .1610 71.00% .0032 .1642 64.00%
  19 .1660 59.00% .0032 .1692 51.00%
#12-24 11/64 .1719 82.00% .0035 .1754 75.00%
  17 .1730 79.00% .0035 .1765 73.00%
  16 .1770 72.00% .0035 .1805 66.00%
  15 .1800 67.00% .0035 .1835 60.00%
  14 .1820 63.00% .0035 .1855 56.00%
#12-28 16 .1770 84.00% .0035 .1805 77.00%
  15 .1800 78.00% .0035 .1835 70.00%
  14 .1820 73.00% .0035 .1855 66.00%
  13 .1850 67.00% .0035 .1885 59.00%
  3/16 .1875 61.00% .0035 .1910 54.00%
1/4-20 9 .1960 83.00% .0038 .1998 77.00%
  8 .1990 79.00% .0038 .2028 73.00%
  7 .2010 75.00% .0038 .2048 70.00%
  13/64 .2031 72.00% .0038 .2069 66.00%
  6 .2040 71.00% .0038 .2078 65.00%
  5 .2055 69.00% .0038 .2093 63.00%
  4 .2090 63.00% .0038 .2128 57.00%
1/4-28 3 .2130 80.00% .0038 .2168 72.00%
  7/32 .2188 67.00% .0038 .2226 59.00%
  2 .2210 63.00% .0038 .2248 55.00%
5/16-18 F .2570 77.00% .0038 .2608 72.00%
  G .2610 71.00% .0041 .2651 66.00%
  17/64 .2656 65.00% .0041 .2697 59.00%
  H .2660 64.00% .0041 .2701 59.00%
5/16-24 H .2660 86.00% .0041 .2701 78.00%
  I .2720 75.00% .0041 .2761 67.00%
  J .2770 66.00% .0041 .2811 58.00%
3/8-16 5/16 .3125 77.00% .0044 .3169 72.00%
  O .3160 73.00% .0044 .3204 68.00%
  P .323 64.00% .0044 .3274 59.00%
3/8-24 21/64 .3281 87.00% .0044 .3325 79.00%
  Q .3320 79.00% .0044 .3364 71.00%
  R .3390 67.00% .0044 .3434 58.00%
7/16-14 T .3580 86.00% .0046 .3626 81.00%
  23/64 .3594 84.00% .0046 .3640 79.00%
  U .3680 75.00% .0046 .3726 70.00%
  3/8 .3750 67.00% .0046 .3796 62.00%
  V .3770 65.00% .0046 .3816 60.00%
7/16-20 W .3860 79.00% .0046 .3906 72.00%
  25/64 .3906 72.00% .0046 .3952 65.00%
  X .3970 62.00% .0046 .4016 55.00%
1/2-13 27/64 .4219 78.00% .0047 .4266 73.00%
  7/16 .4375 63.00% .0047 .4422 58.00%
1/2-20 29/64 .4531 72.00% .0047 .4578 65.00%
9/16-12 15/32 .4688 87.00% .0048 .4736 82.00%
  31/64 .4844 72.00% .0048 .4892 68.00%
9/16-18 1/2 .500 87.00% .0048 .5048 80.00%
  33/64 .5156 65.00% .0048 .5204 58.00%
5/8-11 17/32 .5313 79.00% .0049 .5362 75.00%
  35/64 .5469 66.00% .0049 .5518 62.00%
5/8-18 9/16 .5625 87.00% .0049 .5674 80.00%
  37/64 .5781 65.00% .0049 .5831 58.00%
3/4-10 41/64 .6406 84.00% .0050 .6456 80.00%
  21/32 .6563 72.00% .0050 .6613 68.00%
3/4-16 11/16 .6875 77.00% .0050 .6925 71.00%
7/8-9 49/64 .7656 76.00% .0052 .7708 72.00%
  25/32 .7812 65.00% .0052 .7864 61.00%
7/8-14 51/64 .7969 84.00% .0052 .8021 79.00%
  13/16 .8125 67.00% .0052 .8177 62.00%
1-8 55/64 .8594 87.00% .0059 .8653 83.00%
  7/8 .875 77.00% .0059 .8809 73.00%
  57/64 .8906 67.00% .0059 .8965 64.00%
  29/32 .9063 58.00% .0059 .9122 54.00%
1-12 29/32 .9063 87.00% .0059 .9122 81.00%
  59/64 .9219 72.00% .0060 .9279 67.00%
  15/16 .9375 58.00% .0060 .9435 52.00%
1-14 59-64 .9219 84.00% .0060 .9279 78.00%
  15/16 .9375 67.00% .0060 .9435 61.00%
1 1/8-7 31/32 .9688 84.00% .0062 .9750 81.00%
  63/64 .9844 76.00% .0067 .9911 72.00%
  1 1.000 67.00% .0070 1.007 64.00%
  1 1/64 1.0156 59.00% .0070 1.0226 55.00%
1 1/8-12 1 1/32 1.0313 87.00% .0071 1.0384 80.00%
  1 3/64 1.0469 72.00% .0072 1.0541 66.00%
1 1/4-7 1 3/32 1.0938 84.00% REAM    
  1 7/64 1.1094 76.00% REAM    
  1 1/8 1.125 67.00% REAM    
1 1/4-12 1 5/32 1.1563 87.00% REAM    
  1 11/64 1.1719 72.00% REAM    
1 3/8-6 1 3/16 1.1875 87.00% REAM    
  1 13/64 1.2031 79.00% REAM    
  1 7/32 1.2188 72.00% REAM    
  1 15/64 1.2344 65.00% REAM    
1 3/8-12 1 9/32 1.2813 87.00% REAM    
  1 19/64 1.2969 72.00% REAM    
1 1/2-6 1 5/16 1.3125 87.00% REAM    
  1 21/64 1.3281 79.00% REAM    
  1 11/32 1.3438 72.00% REAM    
  1 23/64 1.3594 65.00% REAM    
1 1/2-12 1 13/32 1.4063 87.00% REAM    
  1 27/64 1.4219 72.00% REAM