Hex Washer Head Self-Drilling Screw, w/EPDM Bonded Washer

Product Description

Hex Washer Head Self-Drilling Screw, w/EPDM Bonded Washer conforming to DIN7504-K specifications are engineered for self-drilling fastening of metal-to-metal and metal-to-wood assemblies. The hex washer head design combined with the EPDM bonded washer provides superior weather sealing for exterior applications, preventing water ingress at the fastener penetration point.

Available in sizes 3.5 through 6.3 with lengths from 13-25 to 19-250, covering the most common range for industrial assembly applications. Custom sizes outside standard ranges can be produced for OEM customers with sufficient volume requirements. Standard material is C1022 hardened carbon steel achieving core hardness 32-40 HRC. Stainless steel variants available for corrosive environments. Surface treatments include Z.P.L. M.Z.P.L. Decromat Ruspert. Zinc plating (Z.P.L) provides 48-96 hours salt spray protection for general indoor use. Black zinc phosphate (B.Z.P) offers matte appearance with mild corrosion resistance. Nickel plating (Ni.P) provides superior wear and chemical resistance. Decromet coating delivers automotive-grade protection exceeding 500 hours per ASTM B117. Ruspert ceramic coating provides extended outdoor and marine exposure protection up to 1000 hours. Hot-dip galvanizing provides heavy-duty atmospheric protection for outdoor structural applications.

Typical applications span steel stud framing and drywall installation, sheet metal ductwork and HVAC systems, roofing and cladding installation, automotive body assembly, electrical equipment mounting, and general construction. These fasteners are designed to meet or exceed applicable international standards for dimensional accuracy and mechanical performance. Aufaster supplies these products in bulk packaging with full material traceability per EN 10204 Type 3.1, dimensional inspection reports, and mill test certificates available on request. Custom sizes, special materials, and non-standard finishes are available for OEM customers with volume requirements. The EPDM washer provides reliable weather sealing for roofing and cladding applications with UV resistance and temperature performance from -40°C to +150°C.