thread rod,hollow threaded rod 1.ISO,ANSI,CE,DIN,BS& non-standard fastener ... 3.Grade:4.8 ,6.8,8...... thread rod,hollow threaded rod,threaded rod accessories 1.What’s the specification of our Products ... Ball head,Button head...Socket typePhillip type,Pozi type,Eleven type,hexagonal type,Torx type,trangle type,slotted point type,square type,Combined type...FinishZinc plated,Nickel plated,Dacroment ...