13/32" drill size
A 13/32 in drill is 0.4062 in (10.32 mm). It sits between 25/64 in and 27/64 in in the fractional series; the nearest metric drill is 10.3 mm.
13/32" 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 |
|---|---|---|---|---|
| 10.3 mm | 0.4055" | −0.019 mm | −0.0007" | Smaller |
| 10.4 mm | 0.4094" | +0.081 mm | +0.0032" | Larger |
Nearby inch drills
The next size down and up in each inch series, so you can pick a substitute from the drawer.
| Drill | Series | Inch | mm | Difference |
|---|---|---|---|---|
| #1 | Number | 0.2280" | 5.79 mm | −0.1782" |
| 25/64" | Fractional | 0.3906" | 9.92 mm | −0.0156" |
| Letter Y | Letter | 0.4040" | 10.26 mm | −0.0022" |
| 13/32" | Fractional | 0.4062" | 10.32 mm | this size |
| Letter Z | Letter | 0.4130" | 10.49 mm | +0.0067" |
| 27/64" | Fractional | 0.4219" | 10.72 mm | +0.0156" |
Threads a 13/32" 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 |
|---|---|---|---|
| M12 × 1.75 | 10.2 mm | 74 % | Good in steel |
Clearance for screws and bolts
Bolts and screws a 13/32" 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 |
|---|---|---|---|---|
| 3/8" bolt | 0.3750" | 0.0312" | 0.0156" | – |
| M10 bolt | 10 mm | 0.32 mm | 0.16 mm | Tighter than close fit (10.5 mm) |
Inch clearance is the drill size minus the basic major diameter. A drilled hole usually cuts slightly oversize.
Fractional drill index
Every size in the series, holes drawn to scale.
Common questions
What size is a 13/32 in drill?
A 13/32 in drill is 0.4062 in, which is 10.32 mm (10.3187 mm exactly).
What is the metric equivalent of a 13/32 in drill?
The nearest metric drill is 10.3 mm, 0.019 mm smaller. The other close size is 10.4 mm.
What thread can I tap with a 13/32 in drill?
It leaves about 74 % thread in M12 × 1.75.
Which number or letter drill is closest to 13/32 in?
Letter Y (0.4040 in) is the closest, 0.0022 in smaller.
What does a 13/32 in drill clear?
It clears a M10 bolt with 0.32 mm total clearance (0.16 mm per side); for metric bolts: tighter than close fit.