S-90648A260 1 1/4"-7 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking technology that maintains secure fastening even under continuous stress
• Enhanced durability in high-temperature environments with nylon insert rated for reliable performance up to 250°F
• Exceptional grip and torque distribution thanks to the extra wide hex profile that prevents rounding and slippage
• Corrosion-resistant protection through zinc-plated steel construction for extended service life in harsh conditions
• Precision threading compatibility with Class 2B thread fit ensuring smooth installation and consistent engagement
• Industry-standard compliance meeting both RoHS 3 and REACH regulations for safe, environmentally responsible manufacturing
• Optimized for heavy-duty applications with coarse UNC threads providing superior load distribution and resistance to loosening

Professional Applications & Engineering Value

This extra wide nylon insert locknut delivers critical engineering solutions for industrial applications where vibration-induced loosening poses significant safety and maintenance challenges. The zinc-plated steel construction provides essential corrosion resistance while maintaining structural integrity under heavy loads. The nylon insert locking mechanism creates consistent friction against mating threads, effectively dampening vibrations in machinery, conveyor systems, and structural assemblies. With its UNC coarse threading and Class 2B thread fit, this fastener ensures reliable performance in automotive, manufacturing, and heavy equipment applications where temperature fluctuations up to 250°F are common. The external hex drive design accommodates standard wrenching tools for efficient installation and maintenance procedures.

Specification Summary & Compliance

This heavy-duty locknut features 1 1/4"-7 UNC coarse threads with Class 2B thread fit for precision engagement and optimal load distribution. The fastener meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. Manufacturing specifications include right-hand threading, 2" width across flats, and 1 41/64" height for substantial bearing surface. The nylon insert maintains locking effectiveness within the specified temperature range while the zinc-plated steel substrate provides reliable mechanical properties for demanding industrial fastening applications.