S-90715A006 5-40 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon insert locking mechanism that maintains secure fastening in high-motion environments
• Excellent corrosion resistance provided by 316 stainless steel construction for extended service life in harsh conditions
• High-temperature capability with nylon insert rated to 220°F (104°C) for reliable performance in thermal cycling applications
• Precise thread engagement through Class 2B thread fit ensuring consistent clamping force and reduced cross-threading risk
• Easy installation and removal with standard external hex drive profile compatible with common wrenching tools
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Optimized for coarse threading with UNC thread pattern providing faster assembly and better performance in damaged thread situations

Professional Applications & Engineering Value

This 5-40 UNC nylon insert locknut delivers exceptional engineering value through its 316 stainless steel construction and advanced locking technology. The nylon insert creates consistent friction against mating threads, effectively preventing loosening from vibration and thermal cycling - a critical solution for machinery, automotive, and electrical enclosures where vibration resistance is paramount. The coarse UNC threading combined with Class 2B thread fit ensures reliable engagement even in applications with minor thread damage or contamination. With temperature resilience up to 220°F, this locknut maintains its locking performance in environments where thermal expansion would compromise conventional fasteners, making it ideal for industrial applications requiring durable, maintenance-free fastening solutions.

Specification Summary & Compliance

This locknut features 5-40 UNC coarse threading with Class 2B thread fit precision manufactured to industry standards. The external hex drive measures 1/4" across flats with a 9/64" height profile. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide. The right-hand thread direction follows standard installation conventions for straightforward assembly procedures.