Copper Bolts,Brass 1.ISO,ANSI,CE,JIS,DIN,BS& non-standard fastener ... ,6.8,8.8,9.8.... Copper Bolts,Copper Bolt,Brass Bolts.1.What’s the specification of our Products ? MaterialsCarbon ... steel is SS201,202,302,304,316...copper is shiny brass , pure copper,such as H62,H65,H68...Aluminum is good ... !Welcome to call me any time !Tel:+86-15917002605 Copper Brass bolts