#47 drill size
A #47 drill is 0.0785 in (1.99 mm). It is the standard tap drill for #3-48 UNC; the nearest metric drill is 2.0 mm.
#47 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" | −0.044 mm | −0.0017" | Smaller |
| 2.0 mm | 0.0787" | +0.006 mm | +0.0002" | 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 #47 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 #47 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 | 0.39 mm | 0.20 mm | Normal fit (normal 1.8, loose 2 mm) |
| #1 screw | 0.0730" | 0.0055" | 0.0028" | – |
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 #47 drill?
A #47 drill is 0.0785 in, which is 1.99 mm (1.9939 mm exactly).
What is the metric equivalent of a #47 drill?
The nearest metric drill is 2.0 mm, 0.006 mm larger. The other close size is 1.95 mm.
What tap uses a #47 drill?
A #47 drill is the standard tap drill for #3-48 UNC (about 76 % thread).
Which fractional drill is closest to #47?
5/64 in (0.0781 in) is the closest, 0.0004 in smaller.
What does a #47 drill clear?
It clears a #1 screw with 0.0055" total clearance (0.0028" per side).