#56 drill size
A #56 drill is 0.0465 in (1.18 mm). It sits between #57 and #55 in the number series; the nearest metric drill is 1.2 mm.
#56 at a glance
Decimal, metric and the nearest sizes in the other series.
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 |
|---|---|---|---|---|
| 1.15 mm | 0.0453" | −0.031 mm | −0.0012" | Smaller |
| 1.2 mm | 0.0472" | +0.019 mm | +0.0007" | 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 #56 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).
Number drill index
Every size in the series, holes drawn to scale.
Common questions
What size is a #56 drill?
A #56 drill is 0.0465 in, which is 1.18 mm (1.1811 mm exactly).
What is the metric equivalent of a #56 drill?
The nearest metric drill is 1.2 mm, 0.019 mm larger. The other close size is 1.15 mm.
What thread can I tap with a #56 drill?
It leaves about 83 % thread in #0-80 UNF.
Which fractional drill is closest to #56?
3/64 in (0.0469 in) is the closest, 0.0004 in larger.