# 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" drill data

- Series: Fractional drill
- Decimal: 0.7188 in
- Metric: 18.26 mm (18.2562 mm exact)
- Nearest metric drill: 18.3 mm (+0.044 mm)

## Nearest metric drills

| Metric drill | Inch | Difference |
|---|---|---|
| 18.2 mm | 0.7165 | −0.056 mm |
| 18.3 mm | 0.7205 | +0.044 mm |

## Nearby inch drills

| Drill | Series | Inch | mm |
|---|---|---|---|
| #1 | Number | 0.2280 | 5.79 |
| Letter Z | Letter | 0.4130 | 10.49 |
| 45/64" | Fractional | 0.7031 | 17.86 |
| 23/32" | Fractional | 0.7188 | 18.26 |
| 47/64" | Fractional | 0.7344 | 18.65 |

## Clearance

| Fastener | Diameter | Clearance | Per side | ISO 273 |
|---|---|---|---|---|
| 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) |


## FAQ

**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.

Source page: https://machinistcharts.com/drill-size/23-32-inch/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)