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DIN 931 Hex Bolt A2 A4 Stainless Steel Hex Head Bolts. Wide Material Selection: Available in Stainless Steel 201, 304, 316, and other grades to meet diverse needs. OEM/ODM Customization: Customize material, surface treatment, specification, and amount based on drawings or samples. Multiple Standard Compliance: Meets DIN, ANSI, GB, JIS, BSW, GOST, ISO, and other international standards. Fast Delivery for Stock Items: Delivery time is generally 10-15 days if goods are in stock. Free Sample Provision: Free samples provided, excluding courier fees, for quality verification. Versatile Application: Suitable for machinery, chemical industry, environmental protection, and building construction.