Other naming systemsABSOLUTE DIAMETER DELTA
fractional-inch drill · nominal diameter
37/64
drill bit size.
A 37/64 bit measures 0.5781 in across (14.684 mm).
The fractional diameter is exact; decimal and metric values are conversions.
Calibrated relative diameter · 1 in reference
37/64 · fractional
0.5781 in
14.684 mm Designation37/64fractional
Inch decimal0.5781nominal
Metric conversion14.684millimetres
Where this size sits from 0 to 1 inch 37/64 · 14.684 mm on a zero to 25.4 millimetre scale. Neighbor marks: 9/16, 19/32.
Measured neighbors
What sits beside 37/64.
“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