metric comparison size · nominal diameter
6.5 mm
drill bit size.
A 6.5 mm bit measures 0.2559 in across (6.500 mm).
The metric diameter is the generated reference value; inches are a conversion. Commercial set contents vary.
Calibrated relative diameter · 1 in reference
6.5 mm · metric
0.2559 in
6.500 mm Designation6.5 mmmetric
Inch decimal0.2559nominal
Metric conversion6.500millimetres
Where this size sits from 0 to 1 inch 6.5 mm · 6.500 mm on a zero to 25.4 millimetre scale. Neighbor marks: F, 6.4 mm.
Measured neighbors
What sits beside 6.5 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