# 19/64" drill size

A 19/64 in drill is 0.2969 in (7.54 mm). It sits between 9/32 in and 5/16 in in the fractional series; the nearest metric drill is 7.5 mm.

## 19/64" drill data

- Series: Fractional drill
- Decimal: 0.2969 in
- Metric: 7.54 mm (7.5406 mm exact)
- Nearest metric drill: 7.5 mm (−0.041 mm)
- Nearest letter drill: Letter M (0.2950 in)

## Nearest metric drills

| Metric drill | Inch | Difference |
|---|---|---|
| 7.5 mm | 0.2953 | −0.041 mm |
| 7.6 mm | 0.2992 | +0.059 mm |

## Nearby inch drills

| Drill | Series | Inch | mm |
|---|---|---|---|
| #1 | Number | 0.2280 | 5.79 |
| 9/32" | Fractional | 0.2812 | 7.14 |
| Letter M | Letter | 0.2950 | 7.49 |
| 19/64" | Fractional | 0.2969 | 7.54 |
| Letter N | Letter | 0.3020 | 7.67 |
| 5/16" | Fractional | 0.3125 | 7.94 |

## Clearance

| Fastener | Diameter | Clearance | Per side | ISO 273 |
|---|---|---|---|---|
| 1/4" bolt | 0.2500" | 0.0469" | 0.0234" | – |


## FAQ

**What size is a 19/64 in drill?**
A 19/64 in drill is 0.2969 in, which is 7.54 mm (7.5406 mm exactly).

**What is the metric equivalent of a 19/64 in drill?**
The nearest metric drill is 7.5 mm, 0.041 mm smaller. The other close size is 7.6 mm.

**Which number or letter drill is closest to 19/64 in?**
Letter M (0.2950 in) is the closest, 0.0019 in smaller.

**What does a 19/64 in drill clear?**
It clears a 1/4" bolt with 0.0469" total clearance (0.0234" per side).

Source page: https://machinistcharts.com/drill-size/19-64-inch/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)