S-90715A135 5/16"-18 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism, preventing loosening in high-motion applications
• Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh environments and chemical exposure
• Reliable high-temperature performance maintaining locking integrity up to 220°F (104°C)
• Easy installation and removal with standard external hex drive design using common wrench tools
• Precise thread engagement with UNC coarse threads and Class 2B fit for consistent fastening performance
• Environmental compliance assurance meeting RoHS 3 and REACH standards for industrial safety
• Durable mechanical properties with standard 1/2" hex profile providing excellent torque transmission

Professional Applications & Engineering Value

This 5/16"-18 nylon insert locknut delivers critical vibration resistance in demanding industrial environments where constant motion and shock loads threaten fastener integrity. The 316 stainless steel construction provides superior corrosion resistance compared to standard stainless grades, making it ideal for marine applications, chemical processing equipment, and outdoor machinery exposed to moisture and corrosive elements. The nylon insert locking mechanism creates consistent friction against mating threads, maintaining clamp load without damaging threads during repeated installations. With UNC coarse threads and Class 2B thread fit, these locknuts ensure reliable engagement in applications ranging from heavy machinery and conveyor systems to automotive assemblies and structural frameworks where vibration-induced loosening could compromise safety and operational reliability.

Specification Summary & Compliance

This locknut features 5/16"-18 UNC coarse threads with Class 2B thread fit for standard industrial applications. The external hex drive measures 1/2" across flats with a 11/32" height profile. Manufactured from 316 stainless steel with right-hand thread direction and nylon insert locking rated to 220°F maximum temperature. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and chemical restriction adherence for industrial procurement requirements.