... 2.OEM:manufacturer 3.ISO9001:2008,ROHS 4.Standard:GB,DIN,JIS,ANSI Galvanized flat washers Product name Galvanized flat washers ... steel, Stainless steel,copper,phosphorization, dacromet,cuprodine.Material grade A2,A4, 4.8,6.8,8.8,12.9Color Plain, blue ... plated, white plated, yellow plated.Standard ISO,GB,DIN,JIS,ANSICetificate ISO9001-2008,SGS,ROHS Function Aatomobile,electronic,mechinery ...