
Stainless Fasteners Ruspert Coating Strawberry Head Hex Head Self Drilling Roofing Screw. Ruspert Corrosion Resistance: Surface treatment provides 500-5000H salt spray test resistance for long-lasting durability. Bi-Metal Construction: Combines SS316 drill point with SCM435 tapping thread for smooth drilling and strong locking. Customization Available: Offers customized grades, sizes, surface treatments, and packaging based on customer requirements. Fast Delivery: In-stock items ship within 7 days; customized orders delivered within 15-30 days. Professional Manufacturer: Over 30 years experience with advanced equipment and ISO certification for quality assurance. Free Sample Testing: Free samples available for quality testing; customer pays freight initially. Global Service Support: 24/7 support with 12-hour response time and offices in UAE, Australia, Vietnam, and England. Versatile Applications: Ideal for roofing construction, timber, and concrete fastening with various standard sizes.