23/32" drill size
A 23/32 in drill is 0.7188 in (18.26 mm). It sits between 45/64 in and 47/64 in in the fractional series; the nearest metric drill is 18.3 mm.
23/32" at a glance
Decimal, metric and the nearest sizes in the other series.
Nearest metric drills
Metric drills step by 0.05 mm below 3 mm and by 0.1 mm from 3 mm. Difference is metric minus inch size.
| Metric drill | Inch | Difference | In inches | Hole |
|---|---|---|---|---|
| 18.2 mm | 0.7165" | −0.056 mm | −0.0022" | Smaller |
| 18.3 mm | 0.7205" | +0.044 mm | +0.0017" | Larger |
Nearby inch drills
The next size down and up in each inch series, so you can pick a substitute from the drawer.
Threads a 23/32" drill can tap
No thread in the tap tables on this site falls between 55 and 85 % thread with this drill, so it is not a useful tap drill for them. Drills this size are mostly used for clearance, pilot and pin holes.
Clearance for screws and bolts
Bolts and screws a 23/32" hole clears, with the diametral clearance and the gap each side. Metric sizes are compared with ISO 273.
| Fastener | Diameter | Clearance | Per side | ISO 273, metric only |
|---|---|---|---|---|
| M16 bolt | 16 mm | 2.26 mm | 1.13 mm | Normal fit (normal 17.5, loose 18.5 mm) |
| M18 bolt | 18 mm | 0.26 mm | 0.13 mm | Tighter than close fit (19 mm) |
Inch clearance is the drill size minus the basic major diameter. A drilled hole usually cuts slightly oversize.
Fractional drill index
Every size in the series, holes drawn to scale.
Common questions
What size is a 23/32 in drill?
A 23/32 in drill is 0.7188 in, which is 18.26 mm (18.2562 mm exactly).
What is the metric equivalent of a 23/32 in drill?
The nearest metric drill is 18.3 mm, 0.044 mm larger. The other close size is 18.2 mm.
What does a 23/32 in drill clear?
It clears a M18 bolt with 0.26 mm total clearance (0.13 mm per side); for metric bolts: tighter than close fit.