
Zinc Coated Hex Head Self-Drilling Screws with EPDM Washers. EPDM Washer Seal: Metal washers with durable rubber EPDM seal secure connections against water leakage and corrosion. Self-Drilling Point: Ensures easy and quick installation of screws without pre-drilling holes. Wide Grade Range: Available in grades 3.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, and 12.9. Multiple Standards: Compliant with DIN, GB, ANSI, BSW, JIS, and GOST international standards. Diverse Surface Treatments: Options include Hot Galvanized, Black, Color-Zinc, Blue White Zinc, and Dacromet. Customization Capability: Offer tailored solutions for unique head shapes, thread types, lengths, and materials. Fast Delivery: Standard orders ship within 15-25 days depending on complexity. 100% Quality Control: Every batch undergoes QC checks for dimensional accuracy, torque, and corrosion resistance.