This is an original part from Homelite. The lock nut (m8 x 1-1/4 mm) is compatible with many pressure washers, and is sold individually. The metal lock nut helps to secure various components of the pressure washer. A wrench, hex key and screwdriver are often needed for the installation.
It is a genuine replacement air cleaner which is supplied by the original equipment manufacturer, it is specially designed for use with Homelite generators. This component helps to remove the dust and other harmful contaminants from the air that is supplied to the engine. It is a complete assembly which includes a durable plastic housing with a foam air filter element and it is sold individually.