Tag: countersink

Applying Position Tolerances to Countersunk Fixed Fastener Assembly Conditions

by Crystal Bemis on February 6, 2023.

When applying position tolerances to countersunk fixed fastener assembly conditions, our design must not only ensure assembly, but also that the fastener head sits flush or below the surface of the part. We are able to determine the values required to achieve this by using the fixed fastener equation.

Countersink

by Crystal Bemis on September 7, 2022.

A countersink consists of a conical hole that is coaxial to a cylindrical hole, where the angle of the cone is determined by the fastener to be used. The purpose of a countersink is to allow a fastener, typically a flathead screw, to sit slightly below the surface of the part.