Manufacturer sourced replacement part designed for use with Milwaukee power tools. It is a standard hardware which will have multiple applications based on your tool. This part is made out of metal and it is sold individually. Requires a a torx screwdriver to tighten/loosen this screw.

This is a genuine Milwaukee replacement part, it is sold individually.
The most common use of the 06-75-2402 Screw is to hold the 42-68-0073 Blade Clamp to the reciprocating spindle on the Milwaukee Sawzalls shown below.
It is used in a few other Milwaukee products