Copper Bolts,Brass 1.ISO,ANSI,CE,JIS,DIN,BS& non-standard ... .8 ,6.8,8.8,9.8.... Copper Bolts,Copper Bolt,Brass Bolts.1.What’s the specification of our Products ? MaterialsCarbon ... is not easy to slide when fasteners match with machine,furniture ,drywall ,wood and so on.4. We have strict quality ...