S-97135A438 1 1/4"-7 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking technology that maintains secure fastening in high-stress environments
• Exceptional durability with Grade 8 strength classification, providing reliable performance in heavy-duty industrial applications
• Enhanced corrosion protection from black-oxide steel construction, extending service life in demanding conditions
• High-temperature compatibility with nylon insert rated up to 220°F, ensuring locking performance in thermal cycling environments
• Optimized installation efficiency through standard external hex drive design and coarse UNC threading for faster assembly
• Precise thread engagement with Class 2B thread fit, delivering consistent clamping force and reduced cross-threading risk
• Regulatory compliance assurance meeting REACH and RoHS 3 standards for global industrial applications

Professional Applications & Engineering Value

This Grade 8 heavy-duty locknut addresses critical vibration-induced loosening challenges in industrial machinery, construction equipment, and transportation systems. The nylon insert locking mechanism creates consistent friction against mating threads, maintaining clamp load integrity where conventional nuts fail. Engineered with black-oxide steel, it provides superior corrosion resistance compared to standard finishes, while the coarse UNC threading ensures rapid installation and reliable performance in high-vibration environments. The external hex drive accommodates standard wrenching tools, streamlining maintenance procedures in confined spaces. Ideal for heavy equipment, structural assemblies, and automotive applications where vibration resistance and 220°F temperature rating are critical performance factors.

Specification Summary & Compliance

This locknut features 1 1/4"-7 UNC coarse threading with Class 2B thread fit tolerance for precise engagement. Manufactured to Grade 8 strength standards with dimensions of 1 13/16" width and 1 25/64" height. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring environmental responsibility in industrial supply chains. Right-hand thread direction and standard hex profile provide compatibility with existing fastener systems and tooling.