... PAN HEAD SELF TAPPIN SCREW,WASHER HEAD WOOD SCREW,SLOTTE COUNTERSUNK HEAD WOOD SCREW.A good non-standard fastenerS manufacturer for your ... better choice .1.What’s the specification of our ... are available.such as :Self tapping threads "A","AB", Threads for chipboard screw,wood screw,drywall screw;Type "M","UNC","UNF ...