S-95615A290 7/8"-9 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon insert locking that maintains secure fastening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in harsh environments
• High-temperature performance with nylon insert rated for continuous operation up to 220°F (104°C)
• Heavy-duty reliability meeting Grade 5 strength standards for demanding industrial applications
• Quick installation with standard external hex drive design and coarse UNC threads for efficient assembly
• Precision thread engagement with Class 2B fit ensuring consistent, reliable performance across applications
• Regulatory compliance with full REACH and RoHS 3 standards for global market acceptance

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel locknut delivers critical vibration resistance in demanding industrial environments where loosening under dynamic loads poses significant safety and maintenance concerns. The nylon insert locking mechanism creates consistent friction against mating threads, maintaining clamp force without damaging threads or requiring excessive torque. Engineered with UNC coarse threads and Class 2B thread fit, this external hex locknut provides reliable performance in heavy machinery, automotive assemblies, construction equipment, and manufacturing systems where temperature fluctuations up to 220°F are common. The combination of zinc-plated steel construction and precision manufacturing ensures long-term reliability while meeting stringent environmental compliance standards.

Specification Summary & Compliance

This locknut features 7/8"-9 UNC coarse threads with Class 2B thread fit tolerance for precise engagement. The external hex drive measures 1-1/4" across flats with a height of 63/64". Manufactured from Grade 5 steel with zinc plating for corrosion resistance, the nut incorporates a nylon insert rated for temperatures up to 220°F. The product fully complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring suitability for global industrial markets.