19/64" drill size
A 19/64 in drill is 0.2969 in (7.54 mm). It sits between 9/32 in and 5/16 in in the fractional series; the nearest metric drill is 7.5 mm.
19/64" 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 |
|---|---|---|---|---|
| 7.5 mm | 0.2953" | −0.041 mm | −0.0016" | Smaller |
| 7.6 mm | 0.2992" | +0.059 mm | +0.0023" | Larger |
Nearby inch drills
The next size down and up in each inch series, so you can pick a substitute from the drawer.
| Drill | Series | Inch | mm | Difference |
|---|---|---|---|---|
| #1 | Number | 0.2280" | 5.79 mm | −0.0689" |
| 9/32" | Fractional | 0.2812" | 7.14 mm | −0.0156" |
| Letter M | Letter | 0.2950" | 7.49 mm | −0.0019" |
| 19/64" | Fractional | 0.2969" | 7.54 mm | this size |
| Letter N | Letter | 0.3020" | 7.67 mm | +0.0051" |
| 5/16" | Fractional | 0.3125" | 7.94 mm | +0.0156" |
Threads a 19/64" drill can tap
No thread in the tap tables on this site falls between 55 and 85 % thread with this drill, so it is not a useful tap drill for them. Drills this size are mostly used for clearance, pilot and pin holes.
Clearance for screws and bolts
Bolts and screws a 19/64" 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 |
|---|---|---|---|---|
| 1/4" bolt | 0.2500" | 0.0469" | 0.0234" | – |
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 19/64 in drill?
A 19/64 in drill is 0.2969 in, which is 7.54 mm (7.5406 mm exactly).
What is the metric equivalent of a 19/64 in drill?
The nearest metric drill is 7.5 mm, 0.041 mm smaller. The other close size is 7.6 mm.
Which number or letter drill is closest to 19/64 in?
Letter M (0.2950 in) is the closest, 0.0019 in smaller.
What does a 19/64 in drill clear?
It clears a 1/4" bolt with 0.0469" total clearance (0.0234" per side).