S-90040A135 7/16"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through center lock distorted thread design, ensuring reliable performance in high-stress environments.
• Enhanced durability and corrosion protection with zinc-plated steel construction, extending service life in industrial settings.
• Secure and precise fastening with Class 2B thread fit, minimizing the risk of loosening under dynamic loads.
• Easy installation and removal using standard external hex drive, compatible with common tools for efficient assembly.
• Compliance with environmental standards including RoHS 3 and REACH, supporting sustainable and safe manufacturing practices.
• High strength reliability with Grade 2 classification, suitable for demanding applications requiring consistent performance.
• Fine thread spacing (UNF) for improved load distribution and resistance to vibration-induced failures.

Professional Applications & Engineering Value

This 7/16"-20 UNF locknut with center lock distorted thread technology is engineered to address common industrial challenges such as vibration loosening and fastener fatigue. Made from zinc-plated steel, it offers excellent corrosion resistance, making it ideal for machinery, automotive, and heavy equipment applications where exposure to harsh conditions is frequent. The external hex drive allows for straightforward installation with standard wrenches, reducing assembly time and labor costs. By incorporating a distorted thread locking type, it maintains clamp force under cyclic stresses, preventing costly downtime and enhancing overall system integrity. Its fine thread design ensures tighter engagement, providing reliable performance in precision assemblies and high-vibration environments like engines and structural frameworks.

Specification Summary & Compliance

This locknut features a 7/16"-20 UNF fine thread with Class 2B thread fit for precise dimensional accuracy, adhering to standard inch measurement systems. It is manufactured from zinc-plated steel with a Grade 2 strength class, ensuring consistent mechanical properties. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility. Dimensions include a width of 11/16" and height of 3/8", with a right-hand thread direction and external hex drive style for universal compatibility in industrial fastening applications.