#32 drill bit size
0.116 in
2.95 mm · number drill
| Inches | 0.116 in |
| Millimetres | 2.95 mm |
| Nearest metric drill | 2.9 mm |
| System | Number (#1 to #60) |
What #32 means
A bit marked #32 is a number drill, and the number is an index rather than a measurement — the higher the number, the smaller the bit. #1 is 0.228 inches and #60 is 0.04. That is the opposite of the fractional sizes stamped on a home set, which is why a number drill and a fraction of similar appearance can be very different holes.
The same hole in the other systems
Three drill systems overlap across this range and a workshop rarely has all three. The nearest bit of each other kind to #32:
| System | Nearest size | Difference |
|---|---|---|
| letter | A — 0.234 in | 0.118 in larger |
| fractional | 7/64" — 0.1094 in | 0.0066 in smaller |
| metric | 2.9 mm | 0.046 mm smaller |
The closest substitute is 0.0066 inches away. For a clearance hole that is nothing; for a tapping hole it moves the thread engagement by several per cent, which is the difference between an easy tap and a broken one.
What gets drilled at 0.116 inches
The busiest part of the number series. Tapping drills for machine screws from #4 to #12 sit in here, along with pilot holes for wood screws and clearance for small pins. If a number drill in a workshop is worn out, it is usually one of these.
Either side of it
| Drill | Inches | Millimetres |
|---|---|---|
| #35 | 0.11 in | 2.79 mm |
| #34 | 0.111 in | 2.82 mm |
| #33 | 0.113 in | 2.87 mm |
| #32 | 0.116 in | 2.95 mm |
| #31 | 0.12 in | 3.05 mm |
| 1/8" | 0.125 in | 3.18 mm |
| #30 | 0.1285 in | 3.26 mm |
Frequently asked questions
What size is a #32 drill bit?
0.116 inches, which is 2.95 mm. Number drills run from #1 at 0.228 inches down to #60 at 0.04, getting smaller as the number rises — the opposite of what most people expect the first time.
What is a #32 drill bit in mm?
2.95 mm. A metric index will offer 2.9 mm as the nearest stocked size, which is 0.046 mm smaller — enough to matter when tapping and not enough to matter for a clearance hole.
Is #32 a tapping drill size?
Not for any of the unified threads on this site. It sits between the sizes the standard taps call for, so it is a clearance or pilot drill rather than a tapping one.
What is the next size up from #32?
#31 at 0.12 inches — 0.004 inches larger. Below it is #33 at 0.113.
Other sizes
- #31 drill bit — 0.12 in, 3.05 mm
- 1/8" drill bit — 0.125 in, 3.18 mm
- #30 drill bit — 0.1285 in, 3.26 mm
- #29 drill bit — 0.136 in, 3.45 mm
- #28 drill bit — 0.1405 in, 3.57 mm
- 9/64" drill bit — 0.1406 in, 3.57 mm
- #27 drill bit — 0.144 in, 3.66 mm
- #26 drill bit — 0.147 in, 3.73 mm