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Body Diameter Body Diameter |
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Step Diameter Step Diameter |
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For Screw Size For Screw Size |
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Point Angle Point Angle |
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Overall Length Overall Length | Show |
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Overall Length Overall Length | Hide |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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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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Step Length Step Length |
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Diameter Rating Diameter Rating |
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Finish Finish |
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Material Material |
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Individual/Set Individual/Set |
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Number of Flutes Number of Flutes |
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![]() | 2 |
Shank Type Shank Type |
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![]() | Round |
Long-Life Counterboring Drill Bits

Also known as subland drill bits, these last longer than standard counterboring drill bits because the diameter stays the same after sharpening. They drill and counterbore at the same time. After drilling and counterboring, tap the hole and install your fastener.
For technical drawings and 3-D models, click on a part number.
Dia. | Lg. | ||||||||
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For Screw Size | Body | Step | Step | Overall | Number of Flutes | Point Angle | For Use On | Each | |
Uncoated High-Speed Steel | |||||||||
No. 10 | 0.313" | 0.190" | 1/2" | 2 13/16" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 000000 |