# #34 drill size

A #34 drill is 0.1110 in (2.82 mm). It sits between #35 and #33 in the number series; the nearest metric drill is 2.8 mm.

## #34 drill data

- Series: Number drill
- Decimal: 0.1110 in
- Metric: 2.82 mm (2.8194 mm exact)
- Nearest metric drill: 2.8 mm (−0.019 mm)
- Nearest fractional: 7/64" (0.1094 in)

## Nearest metric drills

| Metric drill | Inch | Difference |
|---|---|---|
| 2.8 mm | 0.1102 | −0.019 mm |
| 2.85 mm | 0.1122 | +0.031 mm |

## Nearby inch drills

| Drill | Series | Inch | mm |
|---|---|---|---|
| 7/64" | Fractional | 0.1094 | 2.78 |
| #35 | Number | 0.1100 | 2.79 |
| #34 | Number | 0.1110 | 2.82 |
| #33 | Number | 0.1130 | 2.87 |
| 1/8" | Fractional | 0.1250 | 3.17 |
| Letter A | Letter | 0.2340 | 5.94 |

## Threads this drill can tap

| Thread | Standard drill | Thread % with this drill |
|---|---|---|
| #6-40 UNF | #33 | 83 |
| #6-32 UNC | #36 | 67 |

## Clearance

| Fastener | Diameter | Clearance | Per side | ISO 273 |
|---|---|---|---|---|
| #1 screw | 0.0730" | 0.0380" | 0.0190" | – |
| #2 screw | 0.0860" | 0.0250" | 0.0125" | – |
| M2.5 bolt | 2.5 mm | 0.32 mm | 0.16 mm | Close fit (close 2.7, normal 2.9 mm) |
| #3 screw | 0.0990" | 0.0120" | 0.0060" | – |


## FAQ

**What size is a #34 drill?**
A #34 drill is 0.1110 in, which is 2.82 mm (2.8194 mm exactly).

**What is the metric equivalent of a #34 drill?**
The nearest metric drill is 2.8 mm, 0.019 mm smaller. The other close size is 2.85 mm.

**What thread can I tap with a #34 drill?**
It leaves about 83 % thread in #6-40 UNF and 67 % in #6-32 UNC.

**Which fractional drill is closest to #34?**
7/64 in (0.1094 in) is the closest, 0.0016 in smaller.

**What does a #34 drill clear?**
It clears a #3 screw with 0.0120" total clearance (0.0060" per side).

Source page: https://machinistcharts.com/drill-size/number-34/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)