
Hex Collar Tapping Screw DIN 6928 Zinc Plated Hex Flange Head Self-Tapping Screw Wood & Metal Fastener for Construction. Customized OEM ODM Service: We provide customized OEM and ODM services for non-standard fasteners. Multi-Standard Compliance: Products comply with DIN, GB, ANSI, JIS, ISO, and ASME standards. Full-Process Quality Control: Equipped with spectrometers, hardness testers, and salt spray testing machines. Fast Response Time: Technical feedback or quotation provided within 24 hours of receiving information. Mixed Fastener Support: Experienced in handling mixed fastener lists for engineering and project orders. ISO 9001 Certified: Our quality system is ISO 9001 certified for accuracy and consistency. Detailed Labeling: Fasteners can be packed by item, size, or project with clear labels. Material Certificates: Material certificates and inspection records available upon request.