This is a Manufacturer Approved replacement nut for lawn and garden equipment. This item is Metal an is Sold Individually. A lock nut is a type of nut that resists loosening when properly threaded onto a bolt.

This is a genuine replacement part designed for use with gas powered handheld trimmers/clippers and blowers. It is supplied directly from original equipment manufacturer. It is specially designed to keep the fuel/oil in the tank. This fuel cap is made out of plastic and it is sold individually.