S-91853A525 3/8"-24 Locknuts

Key Features & Benefits at a Glance

• Vibration-resistant locking via cotter pin mechanism, preventing loosening in high-stress environments for enhanced operational safety.
• Corrosion-resistant 18-8 stainless steel construction ensures long-term durability in harsh industrial conditions, reducing maintenance costs.
• Precise UNF fine threading with Class 2B fit delivers reliable engagement and consistent torque performance for accurate assembly.
• External hex drive design allows for easy installation and removal with standard tools, improving workflow efficiency.
• Compliance with REACH and RoHS 3 standards guarantees environmental safety and meets global regulatory requirements for industrial use.
• Optimized slot dimensions (min. depth 0.13", width 0.12") ensure secure cotter pin retention, minimizing risk of failure.
• Heavy-duty right-hand thread provides robust fastening strength for demanding applications, supporting load-bearing assemblies.

Professional Applications & Engineering Value

This 3/8"-24 UNF stainless steel locknut is engineered to address critical challenges in industrial settings, such as vibration-induced fastener failure. The cotter pin locking type mechanically secures the nut, making it ideal for machinery, automotive, and aerospace applications where constant motion or shock loads are present. Made from 18-8 stainless steel, it resists corrosion and wear, extending service life in humid or chemical-exposed environments. The UNF fine thread and Class 2B thread fit ensure tight tolerances, reducing the risk of cross-threading and enabling precise torque control. This combination of external hex drive and robust materials delivers reliable performance in heavy-duty locknut uses, enhancing safety and reducing downtime for maintenance.

Specification Summary & Compliance

This locknut adheres to Class 2B thread tolerances for consistent fit and function, with UNF fine threading (3/8"-24) meeting standardized dimensions. It complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring environmental and health safety. The design includes a cotter pin slot with minimum depth of 0.13" and width of 0.12", supporting secure fastening in industrial assemblies.