System of Measurement System of Measurement |
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For Screw Size For Screw Size | Show |
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For Screw Size For Screw Size | Hide |
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Pilot Diameter Pilot Diameter |
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For Hole Diameter For Hole Diameter |
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Shank Type Shank Type |
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 | Round |
Number of Countersinking Ends Number ofCountersinking Ends |
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Pilot Length Pilot Length |
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Shank Material Shank Material |
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Material Material |
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Finish Finish |
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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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Step Diameter Step Diameter |
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Step Length Step Length |
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About Countersinks
Countersinks cut a cone-shaped opening to install screws and rivets flush with a surface or hold workpieces between centers on a lathe. They can also be used for chamfering and deburring.
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High-Speed Steel Vibration-Resistant Through-Hole Countersinks with Pilot for Screws
The built-in pilot maintains alignment in the hole. Also known as zero-flute countersinks, these have an angled hole that passes through the center of the tool to reduce vibration and chatter, which creates smooth cuts and prevents chips from clogging the countersink. The 82° countersink angle is compatible with the profile of flat- and oval-head inch screws.
For technical drawings and 3-D models, click on a part number.
Pilot | 82° Countersink Angle | ||||||||
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| For Hole Dia. | For Screw Size | Body Dia. | Shank Dia. | Dia. | Lg. | Overall Lg. | For Use On | Each | |
Uncoated High-Speed Steel | |||||||||
0 Flute | |||||||||
| 1/2" to 15/16" | 1/2" | 15/16" | 1/2" | 1/2" | 1/4" | 2 11/16" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
Countersinking Drill Bits for Screws
Also known as step drill bits, these bits countersink as they drill. The 82° countersink angle is compatible with the profile of flat- and oval-head inch screws. After multiple sharpenings, the drill bit diameter may become smaller.
For technical drawings and 3-D models, click on a part number.
Dia. | Lg. | 82° Countersink Angle | |||||||
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| For Screw Size | Body | Step | Step | Overall | Shank Dia. | Point Angle | For Use On | Each | |
Uncoated High-Speed Steel | |||||||||
2 Flute | |||||||||
| 1/2" | 0.875" | 0.510" | 1" | 5 1/2" | 0.8750" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |