S-97135A416 5/16"-18 Locknuts

Key Features & Benefits at a Glance

• Superior Vibration Resistance - Nylon insert creates consistent locking force to prevent loosening under extreme vibration and dynamic loads
• High-Temperature Performance - Withstands temperatures up to 220°F (104°C) while maintaining reliable locking capability
• Exceptional Strength Rating - Grade 8 classification ensures maximum load-bearing capacity for heavy-duty industrial applications
• Corrosion-Resistant Protection - Black-oxide steel finish provides durable surface protection against rust and environmental degradation
• Precision Thread Compatibility - Class 2B thread fit guarantees smooth installation and optimal engagement with mating components
• Standard Tool Compatibility - External hex drive design allows for easy installation using common wrenches and sockets
• Environmental Compliance - Meets REACH and RoHS 3 standards for safe use in regulated industries and applications

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these Grade 8 nylon insert locknuts deliver exceptional performance where vibration resistance and reliability are critical. The black-oxide steel construction provides superior corrosion protection while maintaining the high tensile strength required for heavy machinery, automotive assemblies, and construction equipment. The nylon locking insert creates consistent friction that prevents back-off without damaging threads, making them ideal for applications subject to constant vibration or thermal cycling. With UNC coarse threads and Class 2B thread fit, these locknuts ensure quick installation and reliable performance in manufacturing, automotive, and industrial maintenance applications where safety and durability are paramount.

Specification Summary & Compliance

This heavy-duty locknut features precise 5/16"-18 UNC coarse threads with Class 2B thread fit for optimal compatibility and installation. Manufactured to meet Grade 8 strength requirements with standard external hex drive (1/2" width) and 11/32" height profile. Fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring safe use across various industrial sectors. The locking mechanism utilizes a nylon insert rated for continuous service up to 220°F maximum temperature while maintaining reliable vibration resistance.