BA American Outside Tap Tap Drill
Sizes Sizes Diameter Drill Diameter
(inches) (inches)
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12-BA .0512 1.05 mm .0413
0-80 .0600 3/64 .0469
10-BA .0669 #54 .0550
1-64 .0730 #53 .0595
1-72 .0730 #53 .0595
9-BA .0748 #53 .0559
2-56 .0860 #50 .0700
2-64 .0860 #50 .0700
8-BA .0865 1.8 mm .0709
7-BA .0983 #47 .0785
3-48 .0990 #47 .0785
3-56 .0990 #46 .0810
6-BA .1102 2.3 mm .0905
4-40 .1120 #43 .0890
4-48 .1120 #42 .0935
5-44 .1250 #37 .1040
5-BA .1259 #37 .1040
6-32 .1380 #36 .1065
6-40 .1380 #33 .1130
4-BA .1417 3.0 mm .1181
3-BA .1614 #29 .1360
8-32 .1640 #29 .1360
8-36 .1640 #29 .1360
2-BA .1850 4.0 mm .1575
10-24 .1900 #25 .1495
10-32 .1900 #21 .1590
1-BA .2086 4.5 mm .1772
12-24 .2160 #16 .1770
12-28 .2160 #15 .1800