S-97135A350 1 1/8"-7 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through precision-engineered nylon insert that maintains secure locking under dynamic loads
• Exceptional durability in high-temperature environments with nylon insert rated for continuous service up to 220°F
• Heavy-duty performance assurance with Grade 8 strength classification for demanding industrial applications
• Reliable corrosion protection provided by zinc yellow-chromate plating for extended service life in harsh conditions
• Optimized installation efficiency with standard external hex drive design for easy wrench access and torque application
• Precision thread engagement with Class 2B thread fit ensuring consistent, reliable fastening performance
• Enhanced load distribution through coarse UNC threading that resists loosening under heavy vibration and shock loads

Professional Applications & Engineering Value

This Grade 8 heavy-duty nylon insert locknut delivers critical vibration resistance in demanding industrial environments where fastener failure is not an option. The nylon insert locking technology creates consistent friction against mating threads, effectively preventing rotational loosening caused by machinery vibration, impact loads, and thermal cycling. Engineered with coarse UNC threading and Class 2B thread fit, this locknut ensures reliable performance in heavy equipment, automotive assemblies, construction machinery, and industrial manufacturing applications. The zinc yellow-chromate plated steel construction provides dual protection against corrosion and wear, while the external hex drive design facilitates proper torque application in confined spaces. With its ability to withstand temperatures up to 220°F, this locknut maintains its locking integrity in elevated temperature environments common in engine compartments, hydraulic systems, and industrial processing equipment.

Specification Summary & Compliance

This locknut features 1 1/8"-7 UNC coarse threading with Class 2B thread fit per ASME/ANSI standards, ensuring precise dimensional accuracy and reliable thread engagement. Manufactured from high-strength steel meeting Grade 8 mechanical properties, with zinc yellow-chromate plating for corrosion resistance. The nylon insert locking mechanism complies with industrial vibration resistance requirements, while the external hex drive (1 5/8" width) facilitates standard tool compatibility. The product meets relevant industrial specifications for heavy-duty locking fasteners and contains materials compliant with RoHS and REACH environmental directives.