25/32" drill size
A 25/32 in drill is 0.7812 in (19.84 mm). It sits between 49/64 in and 51/64 in in the fractional series; the nearest metric drill is 19.8 mm.
25/32" 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 |
|---|---|---|---|---|
| 19.8 mm | 0.7795" | −0.044 mm | −0.0017" | Smaller |
| 19.9 mm | 0.7835" | +0.056 mm | +0.0022" | 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 25/32" 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).
Clearance for screws and bolts
Bolts and screws a 25/32" 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 |
|---|---|---|---|---|
| M18 bolt | 18 mm | 1.84 mm | 0.92 mm | Close fit (close 19, normal 20 mm) |
| 3/4" bolt | 0.7500" | 0.0312" | 0.0156" | – |
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 25/32 in drill?
A 25/32 in drill is 0.7812 in, which is 19.84 mm (19.8438 mm exactly).
What is the metric equivalent of a 25/32 in drill?
The nearest metric drill is 19.8 mm, 0.044 mm smaller. The other close size is 19.9 mm.
What thread can I tap with a 25/32 in drill?
It leaves about 66 % thread in M22 × 2.5 and 65 % in 7/8-9 UNC.
What does a 25/32 in drill clear?
It clears a 3/4" bolt with 0.0312" total clearance (0.0156" per side).