| THREAD SIZE |
DRILL DIAMETER Fine Thread |
TAP
DRILL SIZE |
| 0-80 | .0469 | 3/64 |
| 1-72 | .0595 | No. 53 |
| 2-64 | .0700 | No. 50 |
| 3-56 | .0820 | No. 45 |
| 4-48 | .0935 | No. 42 |
| 5-44 | .1040 | No. 37 |
| 6-40 | .1130 | No. 33 |
| 8-36 | .1360 | No. 29 |
| 10-32 | .1590 | No. 21 |
| 12-28 | .1820 | No. 14 |
| 1/4-28 | .2130 | No. 3 |
| 5/16-24 | .2720 | 'I' |
| 3/8-24 | .3320 | 'Q' |
| 7/16-20 | .3906 | 25/64 |
| 1/2-20 | .4531 | 29/64 |
| 9/16-18 | .5156 | 33/64 |
| 5/8-18 | .5781 | 37/64 |
| 3/4-16 | .6875 | 11/16 |
| 7/8-14 | .8125 | 13/16 |
| 1"-14 | .9375 | 59/64 |
© 2008 Dallashotrodparts.com