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Premium Stainless Steel A2/A4 DIN3570 U Bolt for Heavy-Duty Applications. Customizable Dimensions: Diameter M3-M36 and length available as per request. High Production Capacity: Monthly capacity of 300 tons with professional quality testing. Quality Certified: ISO9001 and BSCI certified for quality assurance. Wide Material Options: Stainless Steel A2/A4, Carbon Steel, Brass, and Alloy Steel. Multiple Surface Finishes: Plain, Zinc Plated, Black Oxide, HDG, Dacromet, and more. OEM/ODM Service: Accepts custom drawings, samples, and minor customization. Global Export Experience: Exporting to over 20 countries with 13 years of experience. Flexible Payment Terms: Supports T/T, L/C, D/P, PayPal, and Western Union.