Stainless Steel Roofing Siding Screws Hex Washer TEK EPDM 12 x 2-1/2 100-PCS

They are normally fully threaded minus the drill point. Fastener Type: Roofing Siding Self Driller Screws. Other: Self Driller TEK #: 3 (0.333 Long). Head Type: Hex Washer w/EPDM Rubber. Hex Driver Size: 5/16".

eBay