5/64" drill size
A 5/64 in drill is 0.0781 in (1.98 mm). It sits between 1/16 in and 3/32 in in the fractional series; the nearest metric drill is 2.0 mm.
5/64" 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 |
|---|---|---|---|---|
| 1.95 mm | 0.0768" | −0.034 mm | −0.0014" | Smaller |
| 2.0 mm | 0.0787" | +0.016 mm | +0.0006" | 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 5/64" 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 5/64" 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 |
|---|---|---|---|---|
| M1.6 bolt | 1.6 mm | 0.38 mm | 0.19 mm | Normal fit (normal 1.8, loose 2 mm) |
| #1 screw | 0.0730" | 0.0051" | 0.0026" | – |
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 5/64 in drill?
A 5/64 in drill is 0.0781 in, which is 1.98 mm (1.9844 mm exactly).
What is the metric equivalent of a 5/64 in drill?
The nearest metric drill is 2.0 mm, 0.016 mm larger. The other close size is 1.95 mm.
What thread can I tap with a 5/64 in drill?
It leaves about 77 % thread in #3-48 UNC.
Which number or letter drill is closest to 5/64 in?
#47 (0.0785 in) is the closest, 0.0004 in larger.
What does a 5/64 in drill clear?
It clears a #1 screw with 0.0051" total clearance (0.0026" per side).