Stainless Steel Roofing and Siding Screws Hex Washer Head with EPDM Washer. Roofing and Siding Self Drilling Screws. #12 (Major 0.215″, Minor 0.164″). Hex Washer w/EPDM Rubber. Max 0.196 – Min 0.192 w/Washer. Self Driller TEK #: 3 (0.333 Long). Stainless Steel Roofing Self Drilling Screws. Hex washer head self drilling screws with EPDM rubber metal beaked washer for metal roofing and siding. Features a TEK drill point. Used for attaching metal roofing and siding panels to metal stud framing. Normally fully threaded minus the drill point. The EPDM (Ethylene Propylene Diene Monomer) rubber which has a wide range of application. This is the best rubber for metal building and siding applications to stop water from entering the building with long life spans. Hex washer head self-drill with EPDM rubber metal beaked washer for metal roofing and siding The hex washer head self-drill come with a drill point (TEK) for attaching metal roofing and siding panels to metal stud framing. They are normally fully threaded minus the drill point. TEK self-drills are based on the thickness of the metal you are penetrating, the typical 25 to 16 gauge will use a TEK 3. The EPDM (Ethylene Propylene Diene Monomer) rubber which has a wide range of applications, is the best rubber for metal building and siding applications to stop water from entering the building with long life spans. The fastener and metal backed washer are made from 410 stainless steel. To “go green” and reduce our use of plastic all product quantities will be packaged in as few packages as possible. Listing photo is generic for the fastener type listed in this listing and is not to scale. Please refer to the description for fastener details. We will respond with the requested information quickly.