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Custom Threaded Rod Stud Bolt by Zcbolt - Quality You Can Trust. Wide Material Options: Available in Carbon Steel and Alloy Steel grades. Multiple Surface Finishes: Options include Plain, Zinc Plated, Black Oxide, and H.D.G. High Strength Grades: Offers Grade 8.8 and 10.9 for demanding applications. Comprehensive Customization: Full customization available from drawings or samples. ISO Certified Quality: Manufactured with ISO9001:2015 and CNAS-certified lab testing. Large Diameter Capability: Specialized in producing large-diameter rods from M16 to M100. Fast Delivery for Stock: Delivery within 14 days available for items in stock. Traceability System: Batch number marking and online management for full tracking.