1)administer standard: GB,DIN,ISO,JIS,etc. 2.)delivery in time 3.)small quantity can ... ,gr5,gr7,gr9,gr11,etc.2.)size:M3-M603.)standard:GB,DIN,UNC,JIS,BS,ISO4.)features:low density,corrosion resistance ... strength etc.StandardDIN912/933/7991/7984/6921,ISO 7380,JIS,BSMOQ.100piecesTest and Quality1.ISO 9001:20082.Mechanical properties test.3.inspection ...