S-94140A162 5/8"-18 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the flex-top locking design, ensuring reliable performance in high-stress environments
• Enhanced corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial and outdoor applications
• Space-saving thin profile (13/32" height) allows for use in compact assemblies without compromising strength
• Precise Class 2B thread fit provides smooth engagement and consistent locking force for fine UNF threads
• Easy installation and removal with standard external hex drive (15/16" width) using common tools
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use across global markets
• Right-hand fine threading (5/8"-18 UNF) delivers superior holding power in precision applications

Professional Applications & Engineering Value

This thin flex-top locknut addresses critical vibration-induced loosening challenges in industrial equipment, automotive systems, and machinery assemblies. The 18-8 stainless steel construction provides excellent corrosion resistance while maintaining structural integrity under thermal cycling and environmental exposure. The flex-top locking mechanism creates continuous radial pressure against mating threads, eliminating the need for additional locking components and reducing assembly time. With its UNF fine thread configuration and Class 2B thread fit, this external hex locknut ensures precise torque values and reliable performance in critical applications where vibration resistance is paramount. The thin profile makes it particularly valuable in space-constrained designs across aerospace, transportation, and heavy equipment sectors.

Specification Summary & Compliance

This locknut features precision 5/8"-18 UNF fine threads with Class 2B thread fit per ASME/ANSI standards, ensuring consistent engagement and optimal performance. Dimensions include 15/16" width across flats and 13/32" height for the thin profile configuration. The component is manufactured from 18-8 stainless steel and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental and safety standards for industrial fasteners.