# 3/64" drill size

A 3/64 in drill is 0.0469 in (1.19 mm). It is the standard tap drill for #0-80 UNF; the nearest metric drill is 1.2 mm.

## 3/64" drill data

- Series: Fractional drill
- Decimal: 0.0469 in
- Metric: 1.19 mm (1.1906 mm exact)
- Nearest metric drill: 1.2 mm (+0.009 mm)
- Nearest number drill: #56 (0.0465 in)
- Standard tap drill for: #0-80 UNF

## Nearest metric drills

| Metric drill | Inch | Difference |
|---|---|---|
| 1.15 mm | 0.0453 | −0.041 mm |
| 1.2 mm | 0.0472 | +0.009 mm |

## Nearby inch drills

| Drill | Series | Inch | mm |
|---|---|---|---|
| 1/32" | Fractional | 0.0312 | 0.79 |
| #56 | Number | 0.0465 | 1.18 |
| 3/64" | Fractional | 0.0469 | 1.19 |
| #55 | Number | 0.0520 | 1.32 |
| 1/16" | Fractional | 0.0625 | 1.59 |
| Letter A | Letter | 0.2340 | 5.94 |

## Threads this drill can tap

| Thread | Standard drill | Thread % with this drill |
|---|---|---|
| #0-80 UNF | 3/64 | 81 |


## FAQ

**What size is a 3/64 in drill?**
A 3/64 in drill is 0.0469 in, which is 1.19 mm (1.1906 mm exactly).

**What is the metric equivalent of a 3/64 in drill?**
The nearest metric drill is 1.2 mm, 0.009 mm larger. The other close size is 1.15 mm.

**What tap uses a 3/64 in drill?**
A 3/64 in drill is the standard tap drill for #0-80 UNF (about 81 % thread).

**Which number or letter drill is closest to 3/64 in?**
#56 (0.0465 in) is the closest, 0.0004 in smaller.

Source page: https://machinistcharts.com/drill-size/3-64-inch/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)