number drill · nominal diameter

#33
drill bit size.

A #33 bit measures 0.1130 in across (2.870 mm).

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

Diameter conversion cross-checked

Calibrated relative diameter · 1 in reference

#33 · number

0.1130 in

2.870 mm

Designation#33number

Inch decimal0.1130nominal

Metric conversion2.870millimetres

Where this size sits from 0 to 1 inch

#33 · 2.870 mm on a zero to 25.4 millimetre scale. Neighbor marks: 2.9 mm, #34.

0 25.4 mm

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Measured neighbors

What sits beside #33.

“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

2.9 mmmetric 0.1142 inΔ +0.030 mm 2.8 mmmetric 0.1102 inΔ -0.070 mm 7/64fractional 0.1094 inΔ -0.092 mm 3 mmmetric 0.1181 inΔ +0.130 mm

Same seriesNEAREST NOMINAL ROWS

#34number 2.819 mmΔ -0.051 mm #35number 2.794 mmΔ -0.076 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

#33drill bit size.

What sits beside #33.

ASME.

#33
drill bit size.