... ,AISI 2. Size: M2 to M100 3. Material: stainless steel bolt and nut1.Material:Stainless Steel or Carbon Steel2.Head mark ... ,ISO4014,ISO4017,etc8.Production Processing:Cold forged or Hot forged9.Surface:Whited,Plain,Zp,Hdg and Black zp,Chromed10.Quality: Approved ... machine, etc12.Mould: We open by ourself13.Usage Scope:Steel plate, Guardrail and railway etc industrial scope14.Packing:General carton then ...