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. ... H62,H65,H68...Aluminum is good Aluminum.Meanwhile,we can use other materials accordingto customer's demand .SizeThe Diameter : ... ,hexagonal type,Torx type,trangle type,slotted point type,square type,Combined type...FinishZinc plated,Nickel plated,Dacroment Plated, ...