... professional staff and advanced quality-test equipment for ss washerstainless steel washerstandard:DIN,ANSI/ASME,JIS,BSWMaterial grade:XM7(302HQ),304 ... (blue,white and yellow)chrome plated,Cr+34.Materialz:Carbon steel,Stainless steel,alloy steel and so on.5.Competitive price and sound quality ... , carton , pallet or bulk is according to the clients. stainless steel washer,bolt,nut,screw