S-91831A038 1"-8 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism, preventing loosening in high-stress applications
• Excellent corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• High-temperature performance with nylon insert rated up to 220°F (104°C) for demanding thermal conditions
• Precise thread engagement with Class 2B thread fit ensuring reliable, consistent fastening performance
• Easy installation and removal with standard external hex drive design compatible with common tools
• Coarse UNC thread design providing faster assembly and reduced cross-threading risks
• Regulatory compliance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This nylon insert locknut delivers critical vibration resistance in demanding industrial applications where secure fastening is paramount. Engineered from 18-8 stainless steel, it provides exceptional corrosion resistance for outdoor equipment, marine applications, and chemical processing environments. The UNC coarse thread configuration enables rapid assembly while minimizing cross-threading issues in production lines. With its external hex drive design, maintenance personnel can quickly service machinery without specialized tools. The nylon insert maintains consistent locking force up to 220°F maximum temperature, making it suitable for engine components, heavy machinery, and automotive assemblies where thermal cycling and vibration are constant challenges. This combination of materials and engineering addresses the critical need for reliable, long-term fastening solutions in vibration-prone industrial settings.

Specification Summary & Compliance

This locknut features 1"-8 UNC coarse threads with Class 2B thread fit for precise dimensional accuracy and reliable engagement. The external hex design measures 1 7/16" width and 1 3/64" height for standard tool compatibility. Manufactured to industrial standards with right-hand threading, this component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance for industrial fastener applications.