8.8 grade hot-dip galvanized high-strength nut. For more specifications, please contact customer service. The specifications are complete a wide range of styles

Strength grade: Complies with the 8.8 grade standard (GB/T 3098.2-2015), ensuring a stress Sp of 800MPa and a yield strength greater than or equal to 640MPa, suitable for fastening connections under moderate loads. Thread accuracy: 6H grade ordinary thread (GB/T 197-2018) is used, with a pitch diameter deviation of less than or equal to ± 0.125mm, ensuring precise fit with the bolt. Hardness range: Vickers hardness HV220-320, Rockwell hardness HRC22-32, balancing deformation resistance and toughness. The company has a modern production base covering an area of over 100 acres, equipped with more than 200 sets of international advanced production equipment. From precision cold heading, high-speed wire rolling to intelligent surface treatment, the entire process realizes automated production Through multiple international certifications such as ISO9001 and ISO14001, the product qualification rate has remained stable at over 99.9% throughout the year. We have served over 5000 corporate clients and established deep strategic partnerships with multiple Fortune 500 companies.syi