PICTURES ARE REPRESENTATIVE OF ITEM, BUT ARE NOT OF THE ACTUAL ITEM. Product dimensions, finish, head markings, thread length, stamping shape or forging shape, etc., may differ from picture. Products are guaranteed to meet the specifications to which they are manufactured. Specifications allow for tolerances in dimension and shape, which can vary from lot to lot. Used to insulate screws, rivets or shafts from panels in electrnic applications. May also be used as a bushing in mechanical applications to reduce friction between parts. Nylon 6/6. Rockwell M80.