System of Measurement System of Measurement |
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Decimal Size Equivalent Decimal Size Equivalent |
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Length Class Length Class |
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![]() | Short Length |
Finish Finish |
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Material Material |
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For Use On For Use On |
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Shank Type Shank Type |
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![]() | Round |
Point Style Point Style |
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Split |
Point Angle Point Angle |
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Flute Direction Flute Direction |
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Right Hand |
Bit Style Bit Style |
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![]() | Spiral Flute |
Individual/Set Individual/Set |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Drill Bit Decimal Size Equivalents
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About Drill Bits
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Short-Length Drill Bits for Carbon
Fiber, Fiberglass, and Graphite

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers’-length drill bits. A diamond coating gives them the sharpness and wear resistance for drilling clean holes in abrasive material. The split point keeps the bit centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||
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Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Each | |
Inch | ||||||||
Diamond-Coated Carbide | ||||||||
1/8" | 0.125" | 2" | 0.5" | Round | 1/8" | Split | 0000000 | 000000 |
9/64" | 0.1406" | 2" | 0.5" | Round | 9/64" | Split | 0000000 | 00000 |
11/64" | 0.1719" | 2 1/2" | 0.6" | Round | 11/64" | Split | 0000000 | 00000 |
3/16" | 0.1875" | 2 1/2" | 0.6" | Round | 3/16" | Split | 0000000 | 00000 |
7/32" | 0.2188" | 2 1/2" | 0.8" | Round | 7/32" | Split | 0000000 | 00000 |
1/4" | 0.25" | 2 1/2" | 0.8" | Round | 1/4" | Split | 0000000 | 00000 |
5/16" | 0.3125" | 2 3/4" | 1" | Round | 5/16" | Split | 0000000 | 00000 |
3/8" | 0.375" | 3" | 1" | Round | 3/8" | Split | 0000000 | 000000 |
1/2" | 0.5" | 3" | 1" | Round | 1/2" | Split | 0000000 | 000000 |