... washer 1.Delivery time:7days 2.OEM:manufacturer 3.ISO9001:2008,ROHS 4.Standard:GB,DIN,JIS,ANSI plain washer/spring lock ... , Stainless steel,copper,phosphorization, dacromet,cuprodine.Material grade A2,A4, 4.8,6.8,8.8,12.9Color Plain, blue plated ... plated, yellow plated.Standard ISO,GB,DIN,JIS,ANSICetificate ISO9001-2008,SGS,ROHS Function Aatomobile,electronic,mechinery After sale serviceIf there ...