Double End Bolt,Special 1.ISO,ANSI,CE,JIS,DIN,BS& ... 4.8 ,6.8,8.8,9.8... Double End Bolt,Special Head Bolt,Bolt Maker ,M6 Bolt Dimensions1.What ... H62,H65,H68...Aluminum is good Aluminum.Meanwhile,we can use other materials accordingto customer's demand .SizeThe Diameter :Generally ... head,Countersunk head,Bugle head,Oval head,Hex flange head,Round head,Ball head,Button head...Socket typesPhillip type,Pozi ...