8-18 x 2 Unslot Hexwasher w/Bonded NEO EPDM Washer Self Drill Screw Full Thread Zinc Bake 3/8-16 NTE and corrosion-resistant washer is needed

and corrosion-resistant washer is needed

045-inch thickness provides ample support for the fastener

The zinc coating protects the tee nut from corrosion and rust

With a diameter of 6mm and a length of 50mm

8-18 x 2 Unslot Hexwasher w/Bonded NEO EPDM Washer Self Drill Screw Full Thread Zinc Bake 3/8-16 NTE and corrosion-resistant washer is neededThese 8 18 x 2 inch Unslot Hex Washer head screws with bonded neoprene EPDM washers are self drilling and fully threaded. They are made of zinc plated steel for corrosion resistance and have a black oxide finish for added durability. The hex washer head provides a wide bearing surface and the neoprene washer creates a watertight seal. These screws are ideal for use in metal roofing and siding applications.