... :4.8 ,6.8,8.8.. Special screw,special head screw,special machine screw 1.What’s the specification of ... UNF","BSW"thread are available.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 ... and Asia etc.We also have a good team for sale and quality control,good at modern concept of management.3 ...