
Carbon Steel 410 Hex Head Building Roofing Tek Screws Self Drilling Screws with Bonded EPDM Rubber Washers. Diverse Grade Options: Available in 4.8, 8.8, 10.9, and 12.9 grades to meet various strength requirements. Multiple Finish Choices: Offer Zinc, Plain, Black Oxide, Yellow Zinc, and White/Color Plated finishes. OEM and ODM Support: Accept customization from samples, designs, and full customization requests. SGS Certified Quality: Products undergo strict quality control and hold SGS certification. EPDM Rubber Washers: Comes with bonded EPDM rubber washers for enhanced sealing and durability. Flexible Measurement Systems: Available in both Inch and Metric measurement systems. Fast Delivery Time: Peak and off-peak season lead times are both within 15 workdays. Low MOQ Requirement: Minimum Order Quantity is only 1 piece, suitable for small orders.