#48 drill size
A #48 drill is 0.0760 in (1.93 mm). It sits between #49 and #47 in the number series; the nearest metric drill is 1.95 mm.
#48 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 |
|---|---|---|---|---|
| 1.9 mm | 0.0748" | −0.030 mm | −0.0012" | Smaller |
| 1.95 mm | 0.0768" | +0.020 mm | +0.0008" | 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 #48 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 #48 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 | 0.33 mm | 0.17 mm | Normal fit (normal 1.8, loose 2 mm) |
| #1 screw | 0.0730" | 0.0030" | 0.0015" | – |
Inch clearance is the drill size minus the basic major diameter. A drilled hole usually cuts slightly oversize.
Number drill index
Every size in the series, holes drawn to scale.
Common questions
What size is a #48 drill?
A #48 drill is 0.0760 in, which is 1.93 mm (1.9304 mm exactly).
What is the metric equivalent of a #48 drill?
The nearest metric drill is 1.95 mm, 0.020 mm larger. The other close size is 1.9 mm.
What thread can I tap with a #48 drill?
It leaves about 85 % thread in #3-48 UNC.
Which fractional drill is closest to #48?
5/64 in (0.0781 in) is the closest, 0.0021 in larger.
What does a #48 drill clear?
It clears a #1 screw with 0.0030" total clearance (0.0015" per side).