
Factory Direct Sale ASTM A320 L7 Black Oxide Finish Threaded Rods. Comprehensive Material Options: Available in Carbon Steel, Alloy Steel, Stainless Steel, and Special Materials. Extensive Size Range: Sizes cover M3 to M150 with lengths from 5mm to 12 meters. Multiple Surface Finishes: Options include ZINC, HDG, COLOR-ZINC, PTFE, and Black Oxide. Global Standard Compliance: Meets DIN, ASME, ANSI, ISO, UNI, and JIS standards. OEM and ODM Services: Full customization from samples or designs with professional engineering support. Fast Delivery Time: 20-30 days after receiving payment. Wide Application Scope: Suitable for high-speed rail, ships, nuclear power, aerospace, and petrochemicals. ISO and CE Certified: Products certified with ISO, GS, RoHS, and CE standards.