8.1 mm Drill Bits | McMaster-Carr

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System of Measurement

Drill Bit Size

0.35 mm to 2.5 mm (Increments of 0.05 mm)

1", 1 1/32", 1 1/16", 1 1/8", 1 5/32", 1 3/16", 1 1/4", 1 5/16", 1 3/8", 1 7/16", 1 1/2"

1.0 mm to 10.0 mm (Increments of 0.5 mm)

1.0 mm to 13.0 mm (Increments of 0.5 mm)

1.0 mm to 5.9 mm (Increments of 0.1 mm)

1.0 mm to 6.9 mm (Increments of 0.1 mm)

1.0 mm to 7.0 mm (Increments of 0.5 mm)

1/16" to 1/2" (Increments of 1/64")

1/16" to 1/2" (increments of 1/32")

1/16" to 1/4" (Increments of 1/64")

1/16" to 3/8" (Increments of 1/64")

1/2" to 1" (Increments of 1/64")

1/64" to 1/4" (increments of 1/64")

2.6 mm to 10.0 mm (Increments of 0.1 mm)

6.0 mm to 10.0 mm (Increments of 0.1 mm)

9/16" to 1" (increments of 1/16")

33/64" to 63/64" (Increments of 1/64")

For Use On

Decimal Size Equivalent

Length Class

Drill Bit Point Type

Point Angle

Maximum Drilling Depth

Finish

Titanium Nitride (TiN) Coated

Uncoated

Material

Cobalt Steel

High-Speed Steel

M2 High-Speed Tool Steel

Overall Length

Specifications Met

Shank Type

Shank Size

Bit Style

For Drill Bit System of Measurement

Sold As

Flute Type

Flute Direction

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

REACH

RoHS

For Drill Bit Size Decimal Equivalent

0.3189"

Performance

Depth Limiting

Hex Key Size for Set Screw

3/32"

Forward

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8 Products

Fabricating and Machining

Drill Bits

Create holes in metal, wood, plastic, concrete, and more

6 products

Drill Stops

Limit how far bits can drill to create identical hole depths every time

1 product

Raw Materials

Steel

Strong, machinable, and weldable—all with material certificates for traceability

1 product