# #2 drill size

A #2 drill is 0.2210 in (5.61 mm). It sits between #3 and #1 in the number series; the nearest metric drill is 5.6 mm.

## #2 drill data

- Series: Number drill
- Decimal: 0.2210 in
- Metric: 5.61 mm (5.6134 mm exact)
- Nearest metric drill: 5.6 mm (−0.013 mm)
- Nearest fractional: 7/32" (0.2188 in)

## Nearest metric drills

| Metric drill | Inch | Difference |
|---|---|---|
| 5.6 mm | 0.2205 | −0.013 mm |
| 5.7 mm | 0.2244 | +0.087 mm |

## Nearby inch drills

| Drill | Series | Inch | mm |
|---|---|---|---|
| #3 | Number | 0.2130 | 5.41 |
| 7/32" | Fractional | 0.2188 | 5.56 |
| #2 | Number | 0.2210 | 5.61 |
| #1 | Number | 0.2280 | 5.79 |
| Letter A | Letter | 0.2340 | 5.94 |
| 15/64" | Fractional | 0.2344 | 5.95 |

## Threads this drill can tap

| Thread | Standard drill | Thread % with this drill |
|---|---|---|
| 1/4-28 UNF | #3 | 63 |

## Clearance

| Fastener | Diameter | Clearance | Per side | ISO 273 |
|---|---|---|---|---|
| #8 screw | 0.1640" | 0.0570" | 0.0285" | – |
| #10 screw | 0.1900" | 0.0310" | 0.0155" | – |
| M5 bolt | 5 mm | 0.61 mm | 0.31 mm | Normal fit (normal 5.5, loose 5.8 mm) |
| #12 screw | 0.2160" | 0.0050" | 0.0025" | – |


## FAQ

**What size is a #2 drill?**
A #2 drill is 0.2210 in, which is 5.61 mm (5.6134 mm exactly).

**What is the metric equivalent of a #2 drill?**
The nearest metric drill is 5.6 mm, 0.013 mm smaller. The other close size is 5.7 mm.

**What thread can I tap with a #2 drill?**
It leaves about 63 % thread in 1/4-28 UNF.

**Which fractional drill is closest to #2?**
7/32 in (0.2188 in) is the closest, 0.0023 in smaller.

**What does a #2 drill clear?**
It clears a #12 screw with 0.0050" total clearance (0.0025" per side).

Source page: https://machinistcharts.com/drill-size/number-2/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)