Hex Indent Washer Head Self Tapping Drilling Screw /Roofing Screw Fasteners Which Use for Roofing DIN7504K

Hex Indent Washer Head Self Tapping Drilling Screw /Roofing Screw Fasteners Which Use for Roofing DIN7504K. ISO and RoHS Certified: Meets international standards for quality and environmental safety. High-Strength Material: Made from Carbon Steel C1022A with heat treatment for durability. Versatile Surface Finish: Available in white zinc or blue zinc plated options. Wide Size Range: Sizes ST4.2 to ST6.3 with lengths from 19mm to 150mm. Fast Delivery for Stock: 5-10 days delivery time for items currently in stock. Custom Logo Printing: Logo printing available upon request with brand authorization. Flexible Payment Terms: 100% advance for orders under 5000 USD; 30-70% for larger orders. Professional After-Sales: Dedicated support for quality issues and transport damage claims.