S-95030A420 2"-4 1/2 Locknuts

Key Features & Benefits at a Glance

• Secure locking mechanism with a cotter pin slot for reliable vibration resistance in high-stress industrial environments.
• Corrosion-resistant zinc-plated steel construction ensures long-term durability and protection in harsh conditions.
• Standard UNC coarse threads with Class 2B fit provide easy installation and consistent engagement for reduced assembly time.
• Heavy-duty external hex drive allows for high-torque application using common tools, enhancing operational efficiency.
• Precision-engineered slot dimensions (0.485" depth × 0.43" width) ensure compatibility with 3/8" cotter pins for fail-safe retention.
• Compliance with REACH and RoHS 3 standards guarantees safety and environmental responsibility in industrial use.
• Versatile right-hand thread design supports standard fastening applications, minimizing the risk of loosening under dynamic loads.

Professional Applications & Engineering Value

This heavy-duty castle locknut is engineered to address critical challenges in demanding sectors such as machinery, automotive, and construction, where vibration and dynamic stresses can compromise fastener integrity. Crafted from zinc-plated steel, it offers superior corrosion resistance, extending service life in exposed or high-moisture environments. The UNC coarse thread and Class 2B thread fit ensure rapid, secure installation with common tools, reducing downtime. Featuring an external hex drive and a precisely machined cotter pin slot, it provides a reliable mechanical lock that prevents unintentional loosening, making it ideal for industrial fasteners in safety-critical assemblies like axles, shafts, and heavy equipment linkages.

Specification Summary & Compliance

This locknut adheres to UNC coarse thread standards with a Class 2B thread fit for consistent dimensional accuracy. It meets REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) compliance, ensuring environmental and safety standards. The cotter pin slot is designed for a 3/8" diameter with minimum dimensions of 0.485" depth and 0.43" width, supporting reliable locking performance in industrial applications.