Coupling Fasteners,Connecting 1.ISO,ANSI,CE,DIN,BS& non-standard ... is capable 3.Grade:4.8 ,6.8,8.8..... Coupling Fasteners,Connecting Fasteners,Aluminum Fasteners. 1.What’s the specification ... materials accordingto customer's demand .ThreadType "M","UNC","UNF","BSW"thread are available.Head typeHexagon head,Mushroom head,Pan head,Countersunk ...