DIN981/GB912/GB810 M76 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.

These round nuts are crafted from AISI 304 (A2) austenitic stainless steel , containing 18–20% chromium and 8–10% nickel , offering exceptional corrosion resistance, excellent machinability, and compatibility with welding processes. Their performance is particularly suited to humid environments, chemical exposure, or food-contact applications, where hygiene and contamination prevention are critical. The material also exhibits strong thermal stability, enabling reliable operation at elevated temperatures.

Designed in accordance with DIN 981 and GB 810/GB 912 standards for slotted round nuts, these components feature a top-mounted slot for securing locking washers or cotter pins. This design ensures axial fixation of rotating elements such as rolling bearings, gears, pulleys, and couplings. The M76 specification defines key dimensions:

Slot width : ≈ 10.36 mm
Slot depth : ≈ 4.75 mm
Outer diameter : ≈ 110 mm
Thickness : ≈ 15 mm
Compared to the M75 variant, the M76 nut provides an increased outer diameter and slightly greater thickness, accommodating larger shafts or heavy-duty rotating assemblies.

The M76 designation indicates a nominal internal thread diameter of 76 mm , paired with a coarse-thread profile for rapid engagement with matching threaded rods or components. The NO MARK design preserves the natural, uncoated stainless steel finish, ensuring uniformity for batch identification and minimizing surface imperfections. With a tensile and compressive strength of approximately 700 MPa , these nuts are engineered for medium- to heavy-load industrial machinery, high-speed rotating systems, and demanding equipment requiring robust fastening solutions.

While sharing similarities in material, locking methodology, and standardization with the M75 series, the M76 variant is optimized for larger-scale applications involving heavier loads or oversized mating components. Its combination of corrosion resistance, thermal stability, high strength, and standardized interchangeability positions it as an ideal fastening solution for industrial machinery, chemical processing equipment, food-grade environments, and heavy-duty rotating structures.