# 11/64" drill size

A 11/64 in drill is 0.1719 in (4.37 mm). It sits between 5/32 in and 3/16 in in the fractional series; the nearest metric drill is 4.4 mm.

## 11/64" drill data

- Series: Fractional drill
- Decimal: 0.1719 in
- Metric: 4.37 mm (4.3656 mm exact)
- Nearest metric drill: 4.4 mm (+0.034 mm)
- Nearest number drill: #17 (0.1730 in)

## Nearest metric drills

| Metric drill | Inch | Difference |
|---|---|---|
| 4.3 mm | 0.1693 | −0.066 mm |
| 4.4 mm | 0.1732 | +0.034 mm |

## Nearby inch drills

| Drill | Series | Inch | mm |
|---|---|---|---|
| 5/32" | Fractional | 0.1562 | 3.97 |
| #18 | Number | 0.1695 | 4.31 |
| 11/64" | Fractional | 0.1719 | 4.37 |
| #17 | Number | 0.1730 | 4.39 |
| 3/16" | Fractional | 0.1875 | 4.76 |
| Letter A | Letter | 0.2340 | 5.94 |

## Threads this drill can tap

| Thread | Standard drill | Thread % with this drill |
|---|---|---|
| #12-24 UNC | #16 | 82 |
| M5 × 0.8 | 4.2 mm | 61 |

## Clearance

| Fastener | Diameter | Clearance | Per side | ISO 273 |
|---|---|---|---|---|
| #4 screw | 0.1120" | 0.0599" | 0.0299" | – |
| #5 screw | 0.1250" | 0.0469" | 0.0234" | – |
| #6 screw | 0.1380" | 0.0339" | 0.0169" | – |
| M4 bolt | 4 mm | 0.37 mm | 0.18 mm | Close fit (close 4.3, normal 4.5 mm) |
| #8 screw | 0.1640" | 0.0079" | 0.0039" | – |


## FAQ

**What size is a 11/64 in drill?**
A 11/64 in drill is 0.1719 in, which is 4.37 mm (4.3656 mm exactly).

**What is the metric equivalent of a 11/64 in drill?**
The nearest metric drill is 4.4 mm, 0.034 mm larger. The other close size is 4.3 mm.

**What thread can I tap with a 11/64 in drill?**
It leaves about 82 % thread in #12-24 UNC and 61 % in M5 × 0.8.

**Which number or letter drill is closest to 11/64 in?**
#17 (0.1730 in) is the closest, 0.0011 in larger.

**What does a 11/64 in drill clear?**
It clears a #8 screw with 0.0079" total clearance (0.0039" per side).

Source page: https://machinistcharts.com/drill-size/11-64-inch/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)