Roofing screw, self drilling screw

Hex wahser head self drilling screw with EPDM washer

framing screw,metal framing screws

Wafer head with collar drilling point self drilling screw

Hex Head Hexagon Washer Drilling Tail Self Drilling Screw hexagon washer self drilling screw hex washer self drilling screw hex head self drilling screw hex washer head drilling screw hex self drilling screw