... can use other materials accordingto customer's demand .ThreadType "M","UNC","UNF","BSW"thread are available.Head typeHexagon head,Mushroom ... head,Bugle head,Oval head,Hex flange head,Round head,Ball head,Button head...Socket typePhillip type,Pozi type,Eleven ... ...2)Main export market:North America,South America,Eastern Europe,Asia,Western Europe .3)Service:OEM service offered,Design service offered.4 ...