S-90652A030 5/16"-18 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking technology, preventing loosening in high-stress environments
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in harsh conditions
• Optimized installation clearance with extra-wide thin profile design, ideal for space-constrained applications
• Reliable high-temperature performance maintaining locking integrity up to 250°F (121°C)
• Quick installation and removal with standard external hex drive compatible with common tools
• Precise thread engagement with Class 2B thread fit ensuring consistent performance across assemblies
• Broad compatibility with UNC coarse threads matching standard 5/16"-18 bolts and components

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these nylon insert lock nuts provide critical vibration resistance where conventional fasteners fail. The zinc-plated steel construction delivers durable corrosion protection while maintaining the strength required for heavy machinery, automotive assemblies, and structural applications. The extra-wide thin profile offers significant advantages in confined spaces where standard nuts cannot be properly torqued. With UNC coarse threads and Class 2B thread fit, these lock nuts ensure reliable engagement even in high-vibration scenarios, making them ideal for equipment subjected to constant motion, impact, or thermal cycling. The nylon insert maintains consistent locking force through temperature fluctuations up to 250°F, providing long-term reliability in challenging operating conditions.

Specification Summary & Compliance

This heavy-duty lock nut features precision 5/16"-18 UNC coarse threads with Class 2B thread fit for consistent engagement and reliable performance. The external hex drive (9/16" width) and right-hand thread direction ensure compatibility with standard installation tools and procedures. Manufactured to industry standards for dimensional accuracy and mechanical properties, these components are suitable for industrial applications requiring vibration-resistant fastening solutions. The zinc-plated finish provides corrosion resistance while the nylon insert maintains locking integrity within specified temperature ranges.