S-90040A125 5/16"-24 Locknuts

Key Features & Benefits at a Glance

• Vibration-resistant locking with center lock distorted thread design prevents loosening under dynamic loads
• Enhanced corrosion protection through zinc plating extends service life in harsh industrial environments
• Precise thread engagement with Class 2B fit ensures reliable fastening in critical applications
• Superior torque transmission via external hex drive allows for secure installation with standard tools
• Consistent performance with Grade 2 strength classification meets rigorous mechanical demands
• Fine thread advantage with 5/16"-24 UNF provides better adjustment precision and load distribution
• Regulatory compliance with REACH and RoHS 3 standards ensures environmental and workplace safety

Professional Applications & Engineering Value

This zinc-plated steel locknut with center lock distorted thread technology addresses critical vibration-induced failure points in industrial machinery, automotive assemblies, and heavy equipment. The UNF fine thread configuration maintains clamping force under cyclic loading, while the external hex drive facilitates efficient installation in confined spaces. Engineered for Grade 2 strength applications, this 5/16"-24 locknut delivers reliable performance in manufacturing fixtures, conveyor systems, and structural frameworks where vibration resistance is paramount. The combination of distorted thread locking and corrosion-resistant plating makes it ideal for maintenance-critical operations.

Specification Summary & Compliance

Manufactured to UNF thread standards with Class 2B thread fit tolerance for consistent engagement. Features right-hand thread direction and fine thread spacing (24 TPI) for precise fastening. Complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations. Dimensions include 1/2" width across flats and 17/64" height. Meets industrial standards for Grade 2 strength classification in locknut applications.