DIN981/GB912/GB810 M50 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 M50 Round Nuts are primarily used for axial fixation on rotating shafts, with typical applications including securing precision components such as bearing inner rings, bushings, and other critical mechanical parts. A defining feature of these nuts is the slot design on the end face , which requires pairing with a dedicated locking washer (e.g., a tab washer). During installation, the washer’s tongue (or "claw") is engaged into the nut’s slot, and the washer’s other section is bent to align with the shaft’s keyway or flat surface. This mechanism effectively prevents loosening caused by vibration or rotation during equipment operation, ensuring high-reliability fastening.

Material (SS304):
Manufactured from widely used AISI 304 austenitic stainless steel , these nuts offer excellent corrosion resistance against diverse environmental media, including atmospheric moisture, steam, and various chemicals. The material provides superior formability, weldability, and non-magnetism after solution treatment. Its natural-color surface indicates no additional plating or coating, preserving the inherent aesthetics of stainless steel. 

Dimensions & Thread (M50, Coarse):
The nuts have a nominal thread diameter of 50 mm (M50) and adopt a coarse-thread design . Coarse threads are characterized by high strength, reduced sensitivity to minor damage, and ease of assembly/disassembly, making them particularly suitable for heavy-duty applications involving significant loads and reliable fastening requirements. The product is marked as "NO MARK" , indicating no additional manufacturer or grade identifiers on the threaded portion.

Strength (700 MPa):
The nuts are specified with a minimum tensile strength of 700 MPa , a high-grade rating demonstrating that the SS304 material has been properly processed to withstand substantial clamping forces and operational loads. This makes them suitable for heavy-load scenarios and high-reliability mechanical fixation. Actual safe load capacity must be evaluated in conjunction with the mating shaft/bolt strength, proper use of locking washers, and specific working conditions (e.g., vibration, temperature).