... Delivery:15-30days 5. Nice after-sale service Specification1.Thread type: machine thread, triangle thread, metric thread, tapping thread, ... drilling thread, half thread, full thread etc.2.Head type: Hexagon head, Mushroom head, Pan head, Countersunk head,Bugle ... Hexagon socket head , etc.3.Drive type: Slotted, Phillips, Hex Socket, Torx, Rice character type, One Way etc.MaterialCarbon steel, stainless ...