
Heavy-Duty Hex Washer Head Self-Drilling Screws for Sandwich Panels. Customization Capability: Offers tailored solutions for head shapes, thread types, lengths, and materials based on drawings or samples. Wide Material Selection: Available in Carbon Steel, 304/316 Stainless Steel, Brass, Aluminum, Titanium, and niche alloys. Multiple Surface Treatments: Provides Dacromet, Galvanizing, Phosphating, Black Oxide, Powder Coating, and Zinc options. International Standard Compliance: Manufactured to GB, ANSI, DIN, JIS, BSW, and other global standards. Comprehensive Quality Control: 100% QC checks for dimensional accuracy, torque resistance, and corrosion resistance by Taiwan-trained engineers. Flexible MOQ Options: Standard MOQ starts from 100,000 pieces, with lower quantities available for bulk orders or special cases. Fast Delivery Service: Standard orders ship within 15-25 days with expedited production available for urgent needs. 24/7 After-Sales Support: Dedicated team available around the clock to resolve customer issues and provide assistance.