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ASTM A320 L7m Low Temperature High Strength Heavy Hexagon Bolt for Industrial Use with ASME B18.2.2. Comprehensive Standards: Complies with ASTM, ASME, DIN, ANSI, GB, JIS, BSW, GOST. Corrosion Resistance: Stainless steel material resistant to corrosion and high pressure. Hot Galvanizing Finish: Durable hot galvanizing finish for enhanced protection. 18-Month Warranty: Includes an 18-month guarantee for peace of mind. Customized Dimensions: Available in standard and customized dimensions. Fast Sample Preparation: Swift sample preparation due to regular stock availability.