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. For molded or through holes in thin metal, non-ferrous castings, plastics or resin-filled plywood. Screws shall be quenched in liquid and then tempered by reheating to 650°F minimum. Steel: AISI 1016 - 1024 or equivalent steel.. Stainless: 18-8 Stainless steel.