S-90507A240 5/16"-18 Cap Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted thread locking technology that maintains secure fastening in high-motion environments
• Excellent corrosion protection with 18-8 stainless steel construction for extended service life in harsh industrial conditions
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and reduced installation issues
• Easy installation and removal using standard tools thanks to the external hex drive design
• Enhanced safety compliance meeting RoHS 3 and REACH environmental regulations for industrial applications
• Optimal load distribution from the standard cap nut profile that protects threads and prevents material damage
• Wide compatibility with UNC coarse thread (5/16"-18) components commonly used in industrial assemblies

Professional Applications & Engineering Value

This 18-8 stainless steel cap locknut delivers critical performance where vibration loosening threatens assembly integrity. The distorted thread locking mechanism creates permanent friction along the mating threads, eliminating the need for secondary locking devices while maintaining reusable fastening capability. Engineered with UNC coarse threading and Class 2B thread fit, it ensures rapid installation in manufacturing lines while providing consistent clamping force in machinery, transportation equipment, and structural frameworks. The corrosion-resistant properties of 18-8 stainless steel make it ideal for outdoor applications, chemical processing environments, and marine installations where fastener degradation compromises safety.

Specification Summary & Compliance

Manufactured to precise dimensional standards with 1/2" width and 17/32" height, this cap nut features 5/16"-18 UNC coarse threads with Class 2B thread fit for optimal compatibility. The right-hand thread direction and external hex drive provide industry-standard installation. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility while meeting industrial fastener specifications for reliable performance in demanding applications.