... , ANSI, DIN, GB, ASME, BSW, ISO 3.Material:stainless steel, iron,zinc,brass Specifications:Size:PB1.2*5/PB1.0 ... *6Material: Brass, Bronze, Carton steel(low/medium/high carbon steel) Stainless steel, Aluminum alloy,Surface Treatment: Chrome plating, Silver ... screws, Washers/Gaskets, Check rings, Pins, Rivets and etc. 2. by head types Flat, Oval, Binding, Pan, Round, Truss, Button, PF, Pan washer ...