This is a genuine OEM part. The (50 x 40mm pan head pt t-20) screw is made for use with several Milwaukee impact wrenches. The metal screw helps to fasten the front housing assembly to the clamshell housing, and is sold individually. You will need a screwdriver for the proper installation.
This is an original part from the Milwaukee manufacturer. The gasket is composed of cardboard composite, and is sold individually. Compatible with several impact wrenches, the gasket is fitted onto the rear case, providing protection from friction. You will need a screwdriver and pliers for the removal and replacement.
This is an authentic Milwaukee replacement part, sourced from the original manufacturer for use with impact wrenches. The pan head screw is commonly used to secure the two halves of the housing assembly. This screw is available as an individual replacement part, please see model diagram for associative parts.