
Colorful Painted Hex Head Self-Drilling Screws Zinc-Plated Carbon Steel Roofing Fasteners with EPDM Washer Custom Colors. Customized OEM ODM Service: We provide customized OEM and ODM services for non-standard fasteners. Full-Process Quality Control: Equipped with in-house laboratory for spectrometers, hardness, tensile, and salt spray testing. ISO 9001 Certified Quality: Our quality system is ISO 9001 certified ensuring accuracy and consistency. Fast Response Time: We usually respond with technical feedback or quotation within 24 hours. Mixed Fastener Support: Experienced in handling mixed fastener lists for engineering and project orders. Small Batch Production: Support prototype and small to medium batch production for custom orders. Clear Labeling Options: Fasteners can be packed by item, size, or project with clear labeling. Material Certificates Available: Material certificates and inspection records are available upon request.