Other naming systemsABSOLUTE DIAMETER DELTA
fractional-inch drill · nominal diameter
31/32
drill bit size.
A 31/32 bit measures 0.9688 in across (24.606 mm).
The fractional diameter is exact; decimal and metric values are conversions.
Calibrated relative diameter · 1 in reference
31/32 · fractional
0.9688 in
24.606 mm Designation31/32fractional
Inch decimal0.9688nominal
Metric conversion24.606millimetres
Where this size sits from 0 to 1 inch 31/32 · 24.606 mm on a zero to 25.4 millimetre scale. Neighbor marks: 63/64, 61/64.
Measured neighbors
What sits beside 31/32.
“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