... compliance 2.Standards:JIS, ANSI, DIN, GB, ASME, BSW, ISO 3.Material:stainless steel, iron,zinc,brass Specifications:Size:PB1 ... and etc. 2. by head types Flat, Oval, Binding, Pan, Round, Truss, Button, PF, Pan washer, Cheese, Countersunk, Fillister, hexagon, ... Square socket, Torx, Triangle drive, Indented hexagon and etc.Certificates: ISO 9001:2008 and RoHs compliance,Standards: JIS, ANSI, DIN, GB ...