number drill · nominal diameter

#67
drill bit size.

A #67 bit measures 0.0320 in across (0.813 mm).

The inch decimal is the published nominal designation; millimetres are a conversion.

Diameter conversion cross-checked

Calibrated relative diameter · 1 in reference

#67 · number

0.0320 in

0.813 mm

Designation#67number

Inch decimal0.0320nominal

Metric conversion0.813millimetres

Where this size sits from 0 to 1 inch

#67 · 0.813 mm on a zero to 25.4 millimetre scale. Neighbor marks: 0.8 mm, 1/32.

0 25.4 mm

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Measured neighbors

What sits beside #67.

“Nearest” means nominal diameter only. It does not make a neighboring size acceptable for a tolerance, tapping, reaming, or fastener application.

Other naming systemsABSOLUTE DIAMETER DELTA

0.8 mmmetric 0.0315 inΔ -0.013 mm 1/32fractional 0.0313 inΔ -0.019 mm 0.9 mmmetric 0.0354 inΔ +0.087 mm

Same seriesNEAREST NOMINAL ROWS

#68number 0.787 mmΔ -0.025 mm #66number 0.838 mmΔ +0.025 mm

Source record

ASME.

The standard text is paywalled. Number and letter series are cross-checked against public manufacturer charts; exact standard edition/page verification remains a release gate.

Open source record

#67drill bit size.

What sits beside #67.

ASME.

#67
drill bit size.