# 3/16" drill size

A 3/16 in drill is 0.1875 in (4.76 mm). It sits between 11/64 in and 13/64 in in the fractional series; the nearest metric drill is 4.8 mm.

## 3/16" drill data

- Series: Fractional drill
- Decimal: 0.1875 in
- Metric: 4.76 mm (4.7625 mm exact)
- Nearest metric drill: 4.8 mm (+0.038 mm)
- Nearest number drill: #12 (0.1890 in)

## Nearest metric drills

| Metric drill | Inch | Difference |
|---|---|---|
| 4.7 mm | 0.1850 | −0.062 mm |
| 4.8 mm | 0.1890 | +0.038 mm |

## Nearby inch drills

| Drill | Series | Inch | mm |
|---|---|---|---|
| 11/64" | Fractional | 0.1719 | 4.37 |
| #13 | Number | 0.1850 | 4.70 |
| 3/16" | Fractional | 0.1875 | 4.76 |
| #12 | Number | 0.1890 | 4.80 |
| 13/64" | Fractional | 0.2031 | 5.16 |
| Letter A | Letter | 0.2340 | 5.94 |

## Threads this drill can tap

| Thread | Standard drill | Thread % with this drill |
|---|---|---|
| #12-28 UNF | #14 | 61 |

## Clearance

| Fastener | Diameter | Clearance | Per side | ISO 273 |
|---|---|---|---|---|
| #5 screw | 0.1250" | 0.0625" | 0.0312" | – |
| #6 screw | 0.1380" | 0.0495" | 0.0247" | – |
| M4 bolt | 4 mm | 0.76 mm | 0.38 mm | Normal fit (normal 4.5, loose 4.8 mm) |
| #8 screw | 0.1640" | 0.0235" | 0.0117" | – |


## FAQ

**What size is a 3/16 in drill?**
A 3/16 in drill is 0.1875 in, which is 4.76 mm (4.7625 mm exactly).

**What is the metric equivalent of a 3/16 in drill?**
The nearest metric drill is 4.8 mm, 0.038 mm larger. The other close size is 4.7 mm.

**What thread can I tap with a 3/16 in drill?**
It leaves about 61 % thread in #12-28 UNF.

**Which number or letter drill is closest to 3/16 in?**
#12 (0.1890 in) is the closest, 0.0015 in larger.

**What does a 3/16 in drill clear?**
It clears a #8 screw with 0.0235" total clearance (0.0117" per side).

Source page: https://machinistcharts.com/drill-size/3-16-inch/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)