Countersinks for Sheet Metal

What is a Countersink?

A countersink is a conical hole cut into a manufactured object allowing a screw, nail, or bolt to be inserted flush with the surface. Machined countersinks are created with a drill press while formed countersinks are created with punch press tooling. We offer both machined and formed countersinks.

Tip: We recommend the major diameters of countersinks measure between 0.090 in. and 0.500 in. using one of the following standard angles: 82°, 90° 100° and 120°.


Countersink Tolerances
Formed countersink major diameter +/-0.010 in.
Machined countersink major diameter +/-0.010 in.



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