S-90673A114 7/16"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through top lock distorted thread design that maintains clamp force in high-shock environments
• Enhanced corrosion protection with black-oxide steel finish for extended service life in industrial conditions
• Reliable Grade 5 strength ensuring consistent performance under mechanical stress and heavy loads
• Precise Class 2B thread fit for smooth assembly and secure fastening without galling or cross-threading
• Standard external hex drive allowing for easy installation with common wrench tools
• Fine UNF thread profile providing better tension control and improved resistance to loosening
• Compliance with environmental standards including REACH and RoHS 3 for safe industrial use

Professional Applications & Engineering Value

This Grade 5 black-oxide steel locknut delivers exceptional engineering value through its distorted thread locking mechanism that actively resists vibrational loosening in demanding applications. The 7/16"-20 UNF fine thread configuration ensures superior tension maintenance in machinery, automotive assemblies, and industrial equipment where constant motion and stress would compromise standard fasteners. The black-oxide surface treatment provides corrosion resistance without significantly altering dimensions, making it ideal for environments exposed to moisture, chemicals, or temperature variations. With its external hex drive style and Class 2B thread fit, installation becomes efficient while maintaining the precision required for critical connections in manufacturing, construction, and maintenance operations.

Specification Summary & Compliance

This locknut features 7/16"-20 UNF fine threads with Class 2B thread fit for consistent engagement and reliable performance. The distorted thread top lock design provides permanent locking capability without requiring additional components. Manufacturing complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring safe industrial usage. Dimensional specifications include 11/16" width across flats and 27/64" height, manufactured from Grade 5 steel for optimal strength-to-weight ratio in locking applications.