 |
 |
| Machine
Screw Size |
Threads Per Inch |
Minor Dia. |
Tap Drills | Clearance Hole Drills | |||||||
|
Aluminum, Brass 75% Thread |
Stainless Steel, 50% Thread |
All Materials | |||||||||
| Close Fit | Free Fit | ||||||||||
| No. or Dia. | Major Dia. |
Drill Size |
Decimal Equiv. |
Drill Size |
Decimal Equiv. |
Drill Size |
Decimal Equiv. |
Drill Size |
Decimal Equiv. |
||
| 4 | .1120 | 40 | .0813 | 43 | .0890 | 41 | .0960 | 32 | .1160 | 30 | .1285 |
| 48 | .0864 | 42 | .0935 | 40 | .0980 | ||||||
| 5 | .1250 | 40 | .0943 | 38 | .1015 | 7/64 | .1094 | 30 | .1285 | 29 | .1360 |
| 44 | .0971 | 37 | .1040 | 35 | .1100 | ||||||
| 6 | .1380 | 32 | .0997 | 36 | .1065 | 32 | .1160 | 27 | .1440 | 25 | .1495 |
| 40 | .1073 | 33 | .1130 | 31 | .1200 | ||||||
| 8 | .1640 | 32 | .1257 | 29 | .1360 | 27 | .1440 | 18 | .1695 | 16 | .1770 |
| 36 | .1299 | 29 | .1360 | 26 | .1470 | ||||||
| 10 | .1900 | 24 | .1389 | 25 | .1495 | 20 | .1610 | 9 | .1960 | 7 | .2010 |
| 32 | .1517 | 21 | .1590 | 18 | .1695 | ||||||
| 12 | .2160 | 24 | .1649 | 16 | .1770 | 12 | .1890 | 2 | .2210 | 1 | .2280 |
| 28 | .1722 | 14 | .1820 | 10 | .1935 | ||||||
| 32 | .1777 | 13 | .1850 | 9 | .1960 | ||||||
| 1/4 | .2500 | 20 | .1887 | 7 | .2010 | 7/32 | .2188 | F | .2570 | H | .2660 |
| 28 | .2062 | 3 | .2130 | 1 | .2280 | ||||||
| 32 | .2117 | 7/32 | .2188 | 1 | .2280 | ||||||
| 5/16 | .3125 | 18 | .2443 | F | .2570 | J | .2770 | P | .3230 | Q | .3320 |
| 24 | .2614 | I | .2720 | 9/32 | .2812 | ||||||
| 32 | .2742 | 9/32 | .2812 | L | .2900 | ||||||
| 3/8 | .3750 | 16 | .2983 | 5/16 | .3125 | Q | .3320 | W | .3860 | X | .3970 |
| 24 | .3239 | Q | .3320 | S | .3480 | ||||||
| 32 | .3367 | 11/32 | .3438 | T | .3580 | ||||||