... 3.Grade:4.8 ,6.8,8.8....... Blind rivet,Aluminum rivet,Hollow rivets.1.What’s the specification of our ... Head typeHexagon head,Mushroom head,Pan head,Countersunk head,Bugle head,Oval head,Hex flange head,Round head,Ball head,Button head...Socket typePhillip type,Pozi type,Eleven type,hexagonal ... company,but is reasonable for products,it will spend high control force from material till products reach in ...