#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 at a glance
Decimal, metric and the nearest sizes in the other series.
- Decimal inch
- 0.1820"
- Millimetres
- 4.62 mm 4.6228
- Nearest metric drill
- 4.6 mm −0.023 mm
- Nearest fractional
- 3/16" 0.1875", +0.0055"
- Hole area
- 0.0260 in² 16.78 mm²
- Tap drill for
- #12-28 UNF
Nearest metric drills
Metric drills step by 0.05 mm below 3 mm and by 0.1 mm from 3 mm. Difference is metric minus inch size.
| Metric drill | Inch | Difference | In inches | Hole |
|---|---|---|---|---|
| 4.6 mm | 0.1811" | −0.023 mm | −0.0009" | Smaller |
| 4.7 mm | 0.1850" | +0.077 mm | +0.0030" | Larger |
Nearby inch drills
The next size down and up in each inch series, so you can pick a substitute from the drawer.
Threads a #14 drill can tap
Threads from the tap tables on this site that this drill can tap, with the thread percentage it leaves (55–85 % shown).
| Thread | Standard drill | Thread with this drill | Suits |
|---|---|---|---|
| #12-28 UNF | #14 | 73 % | Standard drill |
| #12-24 UNC | #16 | 63 % | Hard, tough metals |
| M5 × 0.5 | 4.5 mm | 58 % | Hard, tough metals |
Clearance for screws and bolts
Bolts and screws a #14 hole clears, with the diametral clearance and the gap each side. Metric sizes are compared with ISO 273.
| Fastener | Diameter | Clearance | Per side | ISO 273, metric only |
|---|---|---|---|---|
| #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" | – |
Inch clearance is the drill size minus the basic major diameter. A drilled hole usually cuts slightly oversize.
Number drill index
Every size in the series, holes drawn to scale.
Common questions
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).