This OEM Top Locknut measures 5/16x18, is made of metal, and it isused to secure parts in place and prevent backing out from vibration. Replacing this part varies in difficulty depending on the part it is securing and the equipment in question, but it is generally an easy job according to our customers. Installation requires a wrench or socket.
The spindle is a genuine item that is supplied by the original equipment manufacturer for use with lawn mowers and trimmers made by Troy-Bilt and MTD. During the installation process, a wrench set might be needed to replace this part. It will require replacing if it becomes broken. This part is available individually and is made of metal.