Stainless Steel Hex Washer EPDM Head Self Drilling Screws
What are hex washer EPDM head self drilling screws? Hex washer EPDM head self drilling screws are stainless screws with a hex washer head, a bonded EPDM sealing washer, and a drill-point tip that bores its own hole in metal. Made from hardened 410 stainless, they seal the hole against water and resist rust, making them a standard for metal roofing and siding.
How the EPDM washer keeps roofing watertight
A bonded EPDM rubber washer sits under the hex head and compresses as the screw seats, sealing the hole against rain and weather. That is what separates a roofing screw from a plain metal screw: it stops leaks at every fastener. The key is torque control, driving until the washer is lightly compressed and flush, not crushed, which would break the seal. 410 stainless provides the hardness to drill along with corrosion resistance that keeps the screw from rusting and staining the panel.
Why choose hex washer EPDM head self drilling screws
- Weathertight seal: bonded EPDM washer closes the hole against water.
- High torque: hex head drives with a nut driver without cam-out.
- 410 stainless: hard enough to drill with strong corrosion resistance.
- No pilot needed: the drill point bores its own hole in metal.
Common applications for hex washer EPDM head self drilling screws
- Metal roofing and siding panels
- Flashing and trim on metal buildings
- Pole barns and steel structures
- Outdoor roofing that must stay watertight
For non-sealed metal fastening, see stainless hex washer head self drilling screws, add matching stainless sealing washers where needed, and browse the main roofing screws category.
Hex Washer EPDM Head Self Drilling Screws FAQ
What stainless grade are these?
They are hardened 410 stainless, hard enough to drill metal while resisting corrosion far better than plated steel.
How tight should I drive an EPDM roofing screw?
Drive until the EPDM washer is lightly compressed and flush with the head. Over-driving crushes the washer and breaks the seal, causing leaks.
Do EPDM washers wear out?
EPDM resists UV and weather for years, but washers can degrade over a long service life. Inspect and replace screws with cracked or flattened washers.