S-90648A215 3/8"-16 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism that maintains secure fastening in high-motion environments
• Enhanced torque application capability with extra wide hex profile for better tool engagement and reduced slipping
• Reliable performance in elevated temperatures with nylon insert rated up to 250°F (121°C)
• Corrosion-resistant zinc-plated steel construction for extended service life in demanding industrial conditions
• Precision UNC coarse threading with Class 2B fit ensures smooth installation and consistent engagement
• Right-hand thread design compatible with standard industrial equipment and maintenance procedures
• External hex drive compatibility with common wrenching tools for straightforward installation and removal

Professional Applications & Engineering Value

This heavy-duty nylon insert lock nut addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and construction equipment. The zinc-plated steel construction provides essential corrosion protection while maintaining the structural integrity required for high-stress applications. The extra wide hex profile delivers superior torque transmission, reducing the risk of tool slippage and damaged fastener heads during installation. With its 3/8"-16 UNC coarse threading and Class 2B thread fit, this lock nut ensures reliable performance in applications subject to constant motion, thermal cycling, and mechanical stress. The nylon insert creates consistent friction locking that remains effective through multiple reuses, making it ideal for maintenance-heavy environments where frequent disassembly is required.

Specification Summary & Compliance

This lock nut features 3/8"-16 UNC coarse threads with Class 2B thread fit for precise engagement and reliable performance. The external hex drive style measures 11/16" across flats with a height of 35/64". Manufactured to industry standards for nylon insert locknuts, this fastener is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting the latest environmental regulations for industrial components. The zinc-plated steel construction ensures consistent quality and performance across all industrial applications.