S-91839A145 1/2"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through Flex-Top locking technology, ensuring secure fastening in high-motion environments
• Excellent corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial conditions
• Precise thread engagement with Class 2B thread fit, providing reliable assembly and reduced cross-threading risks
• Fine thread design (UNF 1/2"-20) delivers enhanced clamping force and better load distribution
• Standard external hex drive enables easy installation with common tools while maintaining high torque capability
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance
• Durable mechanical properties from 18-8 stainless steel, offering long-term reliability in demanding applications

Professional Applications & Engineering Value

This 1/2"-20 UNF flex-top locknut delivers exceptional engineering value in applications where vibration-induced loosening poses significant operational risks. The Flex-Top locking mechanism creates consistent friction along the thread engagement, effectively resisting rotational forces in machinery, automotive assemblies, and industrial equipment. Manufactured from 18-8 stainless steel, this locknut provides inherent corrosion resistance that extends service life in challenging environments including marine applications, food processing equipment, and outdoor infrastructure. The fine thread configuration (UNF) offers superior tension control compared to coarse threads, making it particularly valuable in precision assemblies requiring exact clamping forces. With its external hex drive and standard profile, installation remains straightforward while maintaining the security needed for critical connections.

Specification Summary & Compliance

This locknut features Class 2B thread fit per UNF standards, ensuring precise dimensional accuracy and reliable thread engagement. The 1/2"-20 UNF fine thread specification provides optimal performance in applications requiring fine adjustment capabilities. With dimensions of 3/4" across flats and 39/64" height, this external hex locknut conforms to standard sizing for compatibility with common tools. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting the latest environmental regulations for hazardous substance restrictions. Manufactured to industry standards for right-hand thread direction and external hex drive style, this component ensures seamless integration into existing industrial fastening systems.