S-90040A029 1/4"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through center lock distorted thread design, preventing loosening in high-stress environments
• Enhanced corrosion protection with zinc-plated steel construction, extending service life in industrial settings
• Reliable locking performance with Class 2B thread fit ensuring consistent engagement and secure fastening
• Easy installation and removal using standard external hex drive compatible with common tools
• Grade 2 strength classification providing dependable mechanical performance for general industrial applications
• Right-hand coarse UNC threads (1/4"-20) offering quick assembly and disassembly in time-sensitive operations
• Compliance with environmental regulations including RoHS 3 and REACH standards for safe industrial use

Professional Applications & Engineering Value

These zinc-plated steel locknuts with center lock distorted thread technology address critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and equipment manufacturing. The 1/4"-20 UNC coarse thread configuration combined with Class 2B thread fit ensures precise mating with standard bolts while maintaining consistent clamping force. The external hex drive facilitates efficient installation in confined spaces, making these Grade 2 locknuts ideal for production lines requiring both speed and reliability. The distortion in the thread center creates permanent friction locking without compromising reusability, providing maintenance teams with dependable fastening solutions that withstand dynamic loads and thermal cycling common in industrial environments.

Specification Summary & Compliance

This locknut features 1/4"-20 UNC coarse threads with Class 2B thread fit tolerance, manufactured to standard external hex drive specifications (7/16" width, 7/32" height). The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe handling and industrial application. Manufactured from zinc-plated steel with Grade 2 mechanical properties and right-hand thread direction, these locknuts meet industry standards for vibration-resistant fastening solutions in commercial and industrial assemblies.