S-97135A437 1 1/8"-12 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism that maintains secure fastening under dynamic loads
• Exceptional strength and durability with Grade 8 steel construction, suitable for heavy-duty industrial applications
• Enhanced corrosion protection from black-oxide coating that extends service life in demanding environments
• Reliable high-temperature performance with nylon insert rated up to 220°F for thermal stability
• Precise thread engagement with Class 2B fit ensuring consistent torque values and installation reliability
• Easy installation and removal using standard external hex drive compatible with common tools
• Environmental compliance assurance meeting REACH and RoHS 3 standards for responsible manufacturing

Professional Applications & Engineering Value

This Grade 8 nylon insert locknut delivers critical vibration resistance in demanding mechanical systems where secure fastening is paramount. The black-oxide steel construction provides essential corrosion protection while maintaining the high tensile strength required for heavy-duty industrial applications. The 1 1/8"-12 UNF fine thread configuration offers superior thread engagement in precision assemblies, while the nylon insert creates consistent locking force without damaging mating threads. Engineered to perform in high-temperature environments up to 220°F, this locknut solves common loosening issues in machinery, automotive, and construction equipment where vibration and thermal cycling compromise fastener integrity. The external hex drive ensures compatibility with standard tools for efficient maintenance and assembly operations.

Specification Summary & Compliance

This locknut features Class 2B thread fit per UNF standards with precise 1 1/8"-12 fine thread specifications. Manufacturing complies with Grade 8 strength requirements and dimensional standards for external hex drive configuration (1 5/8" width × 1 11/64" height). The product is fully REACH (EC 1907/2006) compliant and meets RoHS 3 (2015/863/EU) standards, ensuring environmental responsibility while delivering reliable mechanical performance in right-hand thread applications.