chipboard screw 1.Item:chipboard screw with special thread and square tail 2.Material:carbon steel supply all kinds of screw chipboard screw with special thread:1.Item:chipboard screw with special thread and square tail2.Material:carbon steel,stainless steel,brass3.Head type:pan head,flat head,truss hean,plain head4.Recess:pozi,philips,slotted,cambo,six-lobe5.Color:zinc plated,black,chrome or ...