metric comparison size · nominal diameter
9 mm
drill bit size.
A 9 mm bit measures 0.3543 in across (9.000 mm).
The metric diameter is the generated reference value; inches are a conversion. Commercial set contents vary.
Calibrated relative diameter · 1 in reference
9 mm · metric
0.3543 in
9.000 mm Designation9 mmmetric
Inch decimal0.3543nominal
Metric conversion9.000millimetres
Where this size sits from 0 to 1 inch 9 mm · 9.000 mm on a zero to 25.4 millimetre scale. Neighbor marks: T, 8.9 mm.
Measured neighbors
What sits beside 9 mm.
“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.
A generated comparison series from 0.5 to 13.0 mm in 0.1 mm steps. It is not a claim that every size is included in every commercial set.
Open source record