Combined Drill And Tap
COMBINED TAP AND DRILLS ( tap and drill combo)
High Speed Steel-Ground Thread
These combined drills and taps will do two operations at one time. They are designed so that through-holes up to times the tap diameter can be drilled and tapped at high RPM.
Metric size
Nominal size | Drill size | Thread length | Overall length |
M3 X .5 | 0.1015 | 13/32 | 1-15/16 |
M3.5 X .6 | 0.1181 | 7/16 | 2 |
M4 X .7 | 0.1339 | 1/2 | 2-1/8 |
M4.5X.75 | 0.152 | 7/8 | 2-3/8 |
M5 X .8 | 0.1695 | 5/8 | 2-3/8 |
M6 X 1 | 0.2031 | 25/32 | 2-1/2 |
M7 X 1 | 0.242 | 15/16 | 2-27/32 |
M8 X 1.25 | 0.2735 | 15/16 | 2-27/32 |
M10 X 1.5 | 0.3445 | 1-1/16 | 3-3/8 |
M12 X 1.75 | 0.4134 | 1-3/8 | 4-1/16 |
Fractional size
Nominal size | Drill size | Thread length | Overall length |
1/4-20 | .2080 | 13/16 | 2-1/2 |
1/4-28 | .2200 | 23/32 | 2-1/2 |
5/16-18 | .2660 | 31/32 | 2-27/32 |
5/16-24 | .2770 | 7/8 | 2-27/32 |
3/8-16 | .3225 | 1-1/8 | 3-3/8 |
3/8-24 | .3395 | 1 | 3-3/8 |
7/16-14 | .3770 | 1-5/16 | 3-3/4 |
7/16-20 | .3955 | 1-3/16 | 3-3/4 |
1/2-13 | .4350 | 1-15/32 | 4-1/16 |
1/2-20 | .4580 | 1-15/16 | 4-1/16 |
5/8-11 | .5750 | 1-3/4 | 5 |
3/4-10 | .7200 | 2 | 6 |