Black Oxide HDG A490 A490m 5/16 7/8 Heavy Hex Bolt with A563 Dh Heavy Hex Nuts

Black Oxide HDG A490 A490m 5/16 7/8 Heavy Hex Bolt with A563 Dh Heavy Hex Nuts. 20+ Years Experience: Over two decades of expertise in manufacturing and exporting high-quality fasteners. Wide Material Range: Supports Carbon Steel, Stainless Steel, Alloy Steel, Brass, and special materials. Customization Support: Offers OEM/ODM services and non-standard customization based on drawings or samples. Strict Quality Control: Full-process QC with third-party inspection reports like SGS, ISO9001, and CE certified. Large Production Capacity: 15 production lines with an annual capacity of 35,000 tons to meet large orders. Fast Response Time: Business representatives reply within one hour and provide quotations within 24 hours. Global Market Reach: Exports to over 100 countries across Europe, Americas, Asia, Middle East, and Africa. Flexible Payment Terms: Accepts T/T, L/C, PayPal, Western Union, and other secure payment methods.