Other naming systemsABSOLUTE DIAMETER DELTA
fractional-inch drill · nominal diameter
57/64
drill bit size.
A 57/64 bit measures 0.8906 in across (22.622 mm).
The fractional diameter is exact; decimal and metric values are conversions.
Calibrated relative diameter · 1 in reference
57/64 · fractional
0.8906 in
22.622 mm Designation57/64fractional
Inch decimal0.8906nominal
Metric conversion22.622millimetres
Where this size sits from 0 to 1 inch 57/64 · 22.622 mm on a zero to 25.4 millimetre scale. Neighbor marks: 29/32, 7/8.
Measured neighbors
What sits beside 57/64.
“Nearest” means nominal diameter only. It does not make a neighboring size acceptable for a tolerance, tapping, reaming, or fastener application.
Source record
Drill Bit Size Chart.
Fractional sizes are exact rational multiples of one inch.
Open source record