# 9/16" drill size

A 9/16 in drill is 0.5625 in (14.29 mm). It sits between 35/64 in and 37/64 in in the fractional series; the nearest metric drill is 14.3 mm.

## 9/16" drill data

- Series: Fractional drill
- Decimal: 0.5625 in
- Metric: 14.29 mm (14.2875 mm exact)
- Nearest metric drill: 14.3 mm (+0.013 mm)

## Nearest metric drills

| Metric drill | Inch | Difference |
|---|---|---|
| 14.2 mm | 0.5591 | −0.088 mm |
| 14.3 mm | 0.5630 | +0.013 mm |

## Nearby inch drills

| Drill | Series | Inch | mm |
|---|---|---|---|
| #1 | Number | 0.2280 | 5.79 |
| Letter Z | Letter | 0.4130 | 10.49 |
| 35/64" | Fractional | 0.5469 | 13.89 |
| 9/16" | Fractional | 0.5625 | 14.29 |
| 37/64" | Fractional | 0.5781 | 14.68 |

## Threads this drill can tap

| Thread | Standard drill | Thread % with this drill |
|---|---|---|
| M16 × 2 | 14 mm | 66 |

## Clearance

| Fastener | Diameter | Clearance | Per side | ISO 273 |
|---|---|---|---|---|
| M12 bolt | 12 mm | 2.29 mm | 1.14 mm | Normal fit (normal 13.5, loose 14.5 mm) |
| 1/2" bolt | 0.5000" | 0.0625" | 0.0312" | – |
| M14 bolt | 14 mm | 0.29 mm | 0.14 mm | Tighter than close fit (15 mm) |


## FAQ

**What size is a 9/16 in drill?**
A 9/16 in drill is 0.5625 in, which is 14.29 mm (14.2875 mm exactly).

**What is the metric equivalent of a 9/16 in drill?**
The nearest metric drill is 14.3 mm, 0.013 mm larger. The other close size is 14.2 mm.

**What thread can I tap with a 9/16 in drill?**
It leaves about 66 % thread in M16 × 2.

**What does a 9/16 in drill clear?**
It clears a M14 bolt with 0.29 mm total clearance (0.14 mm per side); for metric bolts: tighter than close fit.

Source page: https://machinistcharts.com/drill-size/9-16-inch/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)