15/16" drill size
A 15/16 in drill is 0.9375 in (23.81 mm). It sits between 59/64 in and 61/64 in in the fractional series; the nearest metric drill is 23.8 mm.
15/16" 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 |
|---|---|---|---|---|
| 23.8 mm | 0.9370" | −0.012 mm | −0.0005" | Smaller |
| 23.9 mm | 0.9409" | +0.087 mm | +0.0034" | 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 15/16" 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 15/16" 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 |
|---|---|---|---|---|
| M20 bolt | 20 mm | 3.81 mm | 1.91 mm | Normal fit (normal 22, loose 24 mm) |
| M22 bolt | 22 mm | 1.81 mm | 0.91 mm | Close fit (close 23, normal 24 mm) |
| 7/8" bolt | 0.8750" | 0.0625" | 0.0312" | – |
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 15/16 in drill?
A 15/16 in drill is 0.9375 in, which is 23.81 mm (23.8125 mm exactly).
What is the metric equivalent of a 15/16 in drill?
The nearest metric drill is 23.8 mm, 0.012 mm smaller. The other close size is 23.9 mm.
What thread can I tap with a 15/16 in drill?
It leaves about 82 % thread in M27 × 3 and 58 % in 1-12 UNF.
What does a 15/16 in drill clear?
It clears a 7/8" bolt with 0.0625" total clearance (0.0312" per side).