fractional-inch drill · nominal diameter
9/64
drill bit size.
A 9/64 bit measures 0.1406 in across (3.572 mm).
The fractional diameter is exact; decimal and metric values are conversions.
Calibrated relative diameter · 1 in reference
9/64 · fractional
0.1406 in
3.572 mm Designation9/64fractional
Inch decimal0.1406nominal
Metric conversion3.572millimetres
Where this size sits from 0 to 1 inch 9/64 · 3.572 mm on a zero to 25.4 millimetre scale. Neighbor marks: #28, 3.6 mm.
Measured neighbors
What sits beside 9/64.
“Nearest” means nominal diameter only. It does not make a neighboring size acceptable for a tolerance, tapping, reaming, or fastener application.
This row is at the exposed edge of its series.
Source record
Drill Bit Size Chart.
Fractional sizes are exact rational multiples of one inch.
Open source record