SOCKET HEAD SELF TAPPING 1.ISO,ANSI,JIS,DIN,BS& non-standard fastener ... 8,9.8..... SOCKET HEAD SELF TAPPING SCREW,COUNTERSUNK HEAD PHILLIPS WOOD SCREW,GALVANIZED SELF TAPPING SCREW. A good non-standard ... .Threads/ Scrows Most scrows are available.such as :Self tapping threads "A","AB", Threads for chipboard screw,wood screw,drywall ... if you have any query ! Countersunk Head Phillips Self Tapping Screw