Other naming systemsABSOLUTE DIAMETER DELTA
fractional-inch drill · nominal diameter
11/16
drill bit size.
A 11/16 bit measures 0.6875 in across (17.462 mm).
The fractional diameter is exact; decimal and metric values are conversions.
Calibrated relative diameter · 1 in reference
11/16 · fractional
0.6875 in
17.462 mm Designation11/16fractional
Inch decimal0.6875nominal
Metric conversion17.462millimetres
Where this size sits from 0 to 1 inch 11/16 · 17.462 mm on a zero to 25.4 millimetre scale. Neighbor marks: 43/64, 45/64.
Measured neighbors
What sits beside 11/16.
“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