S-99291A360 7/16"-14 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted thread top-lock technology, ensuring reliable performance in high-stress environments.
• Enhanced durability and corrosion protection with black-oxide steel construction, extending service life in harsh industrial conditions.
• High-strength fastening meeting ASTM Grade C standards for demanding applications requiring robust load-bearing capabilities.
• Precise thread engagement with Class 2B thread fit, reducing the risk of cross-threading and ensuring smooth assembly.
• Easy installation and removal using standard external hex drive, compatible with common tools for efficient maintenance.
• Compliance with environmental regulations including REACH and RoHS 3, making it suitable for global supply chains and sensitive applications.
• Optimized for coarse UNC threads (7/16"-14), providing strong holding power in materials where fine threads may not be ideal.

Professional Applications & Engineering Value

This 7/16"-14 UNC locknut is engineered to address critical challenges in industrial settings, such as loosening under vibration and dynamic loads. The distorted thread locking type creates consistent friction along the threads, effectively resisting back-off without requiring additional locking devices. Made from black-oxide steel, it offers excellent resistance to rust and wear, making it ideal for outdoor machinery, automotive assemblies, and heavy equipment. The ASTM Grade C strength class ensures it can handle high tensile stresses, while the coarse thread spacing allows for quicker installation and better performance in soft or brittle materials. Its external hex drive style facilitates easy tightening with standard wrenches, reducing assembly time and labor costs in production lines.

Specification Summary & Compliance

This locknut features a UNC coarse thread with Class 2B thread fit for precise tolerance and reliable engagement. Dimensions include a width of 11/16" and height of 3/8", adhering to standard industrial specifications. It complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring it is free from hazardous substances. Manufactured to ASTM Grade C standards, it guarantees consistent strength and performance in various applications, from construction to manufacturing.