S-97135A290 7/8"-9 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the nylon insert locking mechanism that maintains secure fastening even under intense dynamic loads
• Exceptional durability in harsh environments with zinc yellow-chromate plating providing excellent corrosion protection
• High-temperature performance with nylon insert rated for continuous operation up to 220°F without compromising locking effectiveness
• Heavy-duty strength certification meeting Grade 8 standards for maximum load-bearing capacity in critical applications
• Easy installation and removal with standard external hex drive design compatible with common industrial tools
• Reliable thread engagement through UNC coarse threading that resists cross-threading and ensures proper seating
• Consistent performance with Class 2B thread fit guaranteeing precise dimensional accuracy across production batches

Professional Applications & Engineering Value

This Grade 8 heavy-duty locknut delivers critical engineering solutions for industrial applications where vibration-induced loosening poses significant safety and maintenance challenges. The nylon insert locking technology creates consistent friction against mating threads, effectively dampening vibrational energy that would otherwise compromise fastener integrity. Manufactured from zinc yellow-chromate plated steel, this locknut maintains corrosion resistance in demanding environments while the UNC coarse threading provides rapid installation and superior resistance to thread damage. The combination of Grade 8 strength classification and 220°F temperature rating makes this fastener ideal for heavy machinery, automotive assemblies, construction equipment, and industrial manufacturing applications where reliability under stress is non-negotiable.

Specification Summary & Compliance

This locknut features precision 7/8"-9 UNC coarse threading with Class 2B thread fit ensuring consistent dimensional accuracy and proper mating with Class 2A external threads. The fastener complies with industry standards for Grade 8 strength classification and incorporates a right-hand threaded, standard hex profile measuring 1-1/4" across flats and 63/64" in height. Manufacturing processes adhere to relevant industrial specifications for zinc yellow-chromate plating and meet RoHS and REACH compliance requirements for environmental safety.