fractional-inch drill · nominal diameter
13/32
drill bit size.
A 13/32 bit measures 0.4063 in across (10.319 mm).
The fractional diameter is exact; decimal and metric values are conversions.
Calibrated relative diameter · 1 in reference
13/32 · fractional
0.4063 in
10.319 mm Designation13/32fractional
Inch decimal0.4063nominal
Metric conversion10.319millimetres
Where this size sits from 0 to 1 inch 13/32 · 10.319 mm on a zero to 25.4 millimetre scale. Neighbor marks: 10.3 mm, Y.
Measured neighbors
What sits beside 13/32.
“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