S-91839A125 1/4"-28 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with Flex-Top locking technology to prevent loosening in high-stress environments
• Excellent corrosion resistance from 18-8 stainless steel construction for long service life in harsh conditions
• Precise thread engagement with Class 2B fit ensuring reliable performance and reduced assembly issues
• Easy installation and removal with standard external hex drive design compatible with common tools
• Fine thread accuracy with 1/4"-28 UNF specification providing superior holding power in critical applications
• Standard dimensional compatibility with 7/16" width fitting industry-standard components and assemblies
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe industrial use

Professional Applications & Engineering Value

This 18-8 stainless steel locknut with Flex-Top locking technology delivers exceptional performance in demanding industrial environments where vibration-induced loosening compromises safety and reliability. The UNF fine thread configuration provides enhanced thread engagement and superior clamping force distribution, making it ideal for precision equipment, automotive assemblies, and machinery subjected to constant motion. The external hex drive enables quick installation with standard tools while maintaining consistent torque application. Manufactured from corrosion-resistant 18-8 stainless steel, this locknut maintains integrity in humid, chemical, or outdoor applications, reducing maintenance frequency and replacement costs. The combination of Class 2B thread fit and flex-top design ensures reliable performance in critical applications where fastener failure is not an option.

Specification Summary & Compliance

This precision 1/4"-28 UNF locknut features Class 2B thread fit tolerances for consistent performance, with standard 7/16" hex width and 19/64" height dimensions. Manufactured to UNF fine thread standards with right-hand threading and external hex drive configuration. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial standards adherence for global supply chain integration.