DIN981/GB912/GB810 M40 Round Nuts

Made from Austenitic stainless steel, they contain about 18-20% chromium and 8-10% nickel, offering exceptional corrosion resistance and good machinability.In the chemical, petrochemical, and food processing industries, SS304 nuts are favored due to their corrosion resistance and hygiene properties. They are also widely used in medical devices, architectural decorations, and machinery.

Stainless Steel DIN981/GB912/GB810 M40 Round Nuts comply with DIN981, GB912 and GB810 standards. They are made of high-quality 304 stainless steel (SS304) and have good corrosion resistance and mechanical strength. The nut size is M40 (nominal diameter 40mm) and the thread type is coarse thread (COARSE). It is suitable for scenes with high requirements for fastener performance, such as industrial equipment, chemical pipelines, and ships.

In terms of material, SS304 stainless steel contains 18% chromium and 8% nickel, is resistant to acid and alkali, high temperature oxidation, and is suitable for humid or corrosive environments. The thread is not marked with the accuracy grade (NO MARK), which complies with conventional industrial standards. The surface is natural color (Natural Color) without additional coating treatment, which is suitable for fields with high cleanliness requirements.

The implementation standards cover the German DIN 981 (round nut size specification) and the Chinese GB 912/GB 810 standard (bolt and nut technical requirements) to ensure compatibility and versatility. The marked strength "700PA" may have unit errors, and the actual tensile strength is usually 500-700MPa (subject to test data).

The product is widely used in heavy machinery (such as bearing fixing), vibration equipment (crushers, screening machines), chemical and marine engineering, and has high strength bearing capacity and assembly efficiency. It is recommended to use a torque wrench during installation to avoid over-tightening and damaging the threads; if higher corrosion resistance is required (such as chloride ion environment), SS316 material can be selected.