7/16" drill size
A 7/16 in drill is 0.4375 in (11.11 mm). It sits between 27/64 in and 29/64 in in the fractional series; the nearest metric drill is 11.1 mm.
7/16" 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 |
|---|---|---|---|---|
| 11.1 mm | 0.4370" | −0.012 mm | −0.0005" | Smaller |
| 11.2 mm | 0.4409" | +0.088 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 7/16" 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).
| Thread | Standard drill | Thread with this drill | Suits |
|---|---|---|---|
| 1/2-13 UNC | 27/64 | 63 % | Hard, tough metals |
Clearance for screws and bolts
Bolts and screws a 7/16" 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 |
|---|---|---|---|---|
| 3/8" bolt | 0.3750" | 0.0625" | 0.0312" | – |
| M10 bolt | 10 mm | 1.11 mm | 0.56 mm | Normal fit (normal 11, loose 12 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 7/16 in drill?
A 7/16 in drill is 0.4375 in, which is 11.11 mm (11.1125 mm exactly).
What is the metric equivalent of a 7/16 in drill?
The nearest metric drill is 11.1 mm, 0.012 mm smaller. The other close size is 11.2 mm.
What thread can I tap with a 7/16 in drill?
It leaves about 63 % thread in 1/2-13 UNC.
What does a 7/16 in drill clear?
It clears a M10 bolt with 1.11 mm total clearance (0.56 mm per side); for metric bolts: normal fit.