... 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, ... in charge of quality control.we random check or total check products in each procedure,products will be qualified ... available .5)Payment:T/T. Deposit(30% of total amount)should be paid before production; balance(70% of ...