"You should buy this Screw ST4.2 x 12mm"

A screw on a motorcycle is a threaded fastener used to secure various components and parts together. Typically made from metal, such as steel or aluminum, screws come in various sizes, lengths, and thread types to suit different applications. They feature a head that allows for tightening or loosening using tools like screwdrivers or wrenches. Screws are commonly used in assembling parts like fairings, engine covers, and mounting brackets.