S-97135A113 1 1/4"-12 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with a nylon insert that maintains locking force in high-stress environments
• Exceptional corrosion protection from zinc yellow-chromate plating, extending service life in harsh conditions
• High-strength Grade 8 construction ensures reliable performance under heavy loads and extreme pressures
• Precision UNF fine threading with Class 2B fit for smooth assembly and secure fastening in critical applications
• Temperature resilience up to 220°F allows consistent performance in elevated heat environments
• Standard external hex design enables easy installation with common tools while providing dependable torque transfer
• Right-hand thread configuration ensures compatibility with standard industrial equipment and fastening systems

Professional Applications & Engineering Value

This Grade 8 heavy-duty locknut delivers critical vibration resistance in demanding industrial applications where secure fastening is paramount. The nylon insert locknut design creates consistent friction against mating threads, preventing loosening under dynamic loads in machinery, automotive systems, and heavy equipment. The zinc yellow-chromate plated steel construction provides superior corrosion resistance, making it ideal for outdoor applications or environments with exposure to moisture and chemicals. The UNF fine threading with Class 2B thread fit ensures precise engagement and reliable performance in critical assemblies where vibration-induced failure is a concern. With its 220°F temperature rating, this locknut maintains integrity in engine compartments, industrial ovens, and other elevated temperature applications where standard nylon inserts would degrade.

Specification Summary & Compliance

This 1 1/4"-12 UNF locknut features Class 2B thread fit per UNF standards, ensuring precise dimensional accuracy and interchangeability. Manufactured from high-strength Grade 8 steel with zinc yellow-chromate plating for enhanced corrosion protection. The nylon insert is rated for continuous service up to 220°F. Complies with industry standards for heavy-duty locknuts and meets relevant material specifications for industrial fasteners. The external hex drive style conforms to standard wrenching dimensions for compatibility with common installation tools.