
Black Phosphate Countersunk Phillips Drywall Screw Wood Screw for Construction & Renovation. Customized OEM ODM Service: We provide customized OEM and ODM services for non-standard fasteners based on drawings or samples. Multi-Standard Compliance: Products comply with international standards including DIN, GB, ANSI, JIS, ISO, and ASME. Full-Process Quality Control: Equipped with in-house laboratory for spectrometers, hardness, tensile, and salt spray testing. Fast Response Time: Technical feedback or quotation provided within 24 hours after receiving BOM or drawings. Mixed Fastener Capability: Experienced in handling mixed fastener lists and combining different items in one shipment. ISO 9001 Certified: Quality system is ISO 9001 certified ensuring accuracy and consistency for all orders. Detailed Labeling: Fasteners can be packed separately by item, size, or project with clear labels for site use. Material Certificates Available: Material certificates and inspection records are available upon request for all orders.