
TSR/Tsingri SS304+SCM435 Phillips Truss Head Round Head Bi-Metal Screws Self Drilling Screws. Bi-Metal Construction: Combines SS304 head and SCM435 shank for superior strength and corrosion resistance. Customized Dimensions: Available in sizes ST4.2-ST4.8 and lengths 16mm-125mm or fully customized. Superior Corrosion Resistance: Salt spray resistance up to 5000 hours with Ruspert or Dacromet surface treatment. Free Sample Availability: Free samples provided for testing, customer covers freight cost. Fast In-Stock Delivery: Standard items available within 7 days; customized orders take 15-30 days. Third-Party Inspection: SGS reports and third-party testing available upon request. OEM/ODM Services: Full customization from designs or samples with flexible customization options. ISO Certified Quality: Manufactured under ISO9001:2015 with FM and ETA certifications.