11/32 in Drill Size
fractional drill
11/32″ 0.3438 in 8.73 mm
A 11/32 in drill is the standard tap drill for 3/8-32.
What a 11/32 in drill taps
Every thread this drill cuts between 50% and 85% of thread, deepest first. Outside that band it is the wrong drill for the job, so nothing below that line is listed.
| Thread | % thread | Chart drill | Chart % |
|---|---|---|---|
| M10 x 1.25 | 78.2% | 8.8 mm | 73.9% |
| 3/8-32 chart drill | 76.9% | 11/32″ | 76.9% |
| M10 x 1.5 | 65.1% | 8.5 mm | 77.0% |
| 3/8-24 | 57.6% | Q | 79.4% |
Other jobs for a 11/32 in
- Hard-material tap drill
- The size to use in stainless or tool steel for 3/8-24, where it leaves a shallower thread than the standard drill and cuts tapping torque.
- Clearance hole
- The through hole a bolt passes in, not a tapped hole: normal fit for 5/16-18, normal fit for 5/16-24, normal fit for 5/16-32. See the clearance hole chart.
Drills either side
11/32 in drill: common questions
What size is a 11/32 in drill?
0.3438 inches, which is 8.73 mm. It is a fractional drill.
What can I tap with a 11/32 in drill?
4 threads: M10 x 1.25 at 78.2%, 3/8-32 at 76.9%, M10 x 1.5 at 65.1%, 3/8-24 at 57.6%.
Is a 11/32 in drill the standard tap drill for anything?
Yes, for 3/8-32 (76.9% thread). That is the size published tap and drill charts give.
Is a 11/32 in drill used for clearance holes?
Yes: normal fit for 5/16-18, normal fit for 5/16-24, normal fit for 5/16-32. A clearance hole is not tapped; the bolt passes through it.
What drill is next to a 11/32 in?
Down: 8.7 mm at 0.3425 in. Up: 8.8 mm at 0.3465 in.