fractional-inch drill · nominal diameter
1/16
drill bit size.
A 1/16 bit measures 0.0625 in across (1.587 mm).
The fractional diameter is exact; decimal and metric values are conversions.
Calibrated relative diameter · 1 in reference
1/16 · fractional
0.0625 in
1.587 mm Designation1/16fractional
Inch decimal0.0625nominal
Metric conversion1.587millimetres
Where this size sits from 0 to 1 inch 1/16 · 1.587 mm on a zero to 25.4 millimetre scale. Neighbor marks: 1.6 mm, #52.
Measured neighbors
What sits beside 1/16.
“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