# #14 drill size

A #14 drill is 0.1820 in (4.62 mm). It is the standard tap drill for #12-28 UNF; the nearest metric drill is 4.6 mm.

## #14 drill data

- Series: Number drill
- Decimal: 0.1820 in
- Metric: 4.62 mm (4.6228 mm exact)
- Nearest metric drill: 4.6 mm (−0.023 mm)
- Nearest fractional: 3/16" (0.1875 in)
- Standard tap drill for: #12-28 UNF

## Nearest metric drills

| Metric drill | Inch | Difference |
|---|---|---|
| 4.6 mm | 0.1811 | −0.023 mm |
| 4.7 mm | 0.1850 | +0.077 mm |

## Nearby inch drills

| Drill | Series | Inch | mm |
|---|---|---|---|
| 11/64" | Fractional | 0.1719 | 4.37 |
| #15 | Number | 0.1800 | 4.57 |
| #14 | Number | 0.1820 | 4.62 |
| #13 | Number | 0.1850 | 4.70 |
| 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 |
|---|---|---|
| #12-28 UNF | #14 | 73 |
| #12-24 UNC | #16 | 63 |
| M5 × 0.5 | 4.5 mm | 58 |

## Clearance

| Fastener | Diameter | Clearance | Per side | ISO 273 |
|---|---|---|---|---|
| #5 screw | 0.1250" | 0.0570" | 0.0285" | – |
| #6 screw | 0.1380" | 0.0440" | 0.0220" | – |
| M4 bolt | 4 mm | 0.62 mm | 0.31 mm | Normal fit (normal 4.5, loose 4.8 mm) |
| #8 screw | 0.1640" | 0.0180" | 0.0090" | – |


## FAQ

**What size is a #14 drill?**
A #14 drill is 0.1820 in, which is 4.62 mm (4.6228 mm exactly).

**What is the metric equivalent of a #14 drill?**
The nearest metric drill is 4.6 mm, 0.023 mm smaller. The other close size is 4.7 mm.

**What tap uses a #14 drill?**
A #14 drill is the standard tap drill for #12-28 UNF (about 73 % thread).

**Which fractional drill is closest to #14?**
3/16 in (0.1875 in) is the closest, 0.0055 in larger.

**What does a #14 drill clear?**
It clears a #8 screw with 0.0180" total clearance (0.0090" per side).

Source page: https://machinistcharts.com/drill-size/number-14/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)