scope:

This specification covers light-duty and heavy-duty punches and dies used for cutting smooth holes in plastic, hard rubber, and metal.

Federal specifications do not cover all varieties of the commodity indicated by the title of the specification, or which are commercially available, but are intended to cover only those generally used by the Federal Government.

The punches shall be of the following types and classes, as specified (see 6.1):

Type I - Light duty (chassis) Class 1 - Round hole Class 2 - Square hole Type II - Heavy duty (conduit)