S-97135A444 1 1/4"-7 Locknuts

Key Features & Benefits at a Glance

• Exceptional vibration resistance through nylon insert locking mechanism that maintains secure fastening in high-motion environments
• Superior corrosion protection with black-oxide steel finish for extended service life in demanding industrial conditions
• Heavy-duty performance backed by Grade 8 strength classification for high-torque applications requiring reliable clamping force
• High-temperature capability with nylon insert rated to 220°F (104°C) for thermal stability in heated applications
• Quick installation advantage with coarse UNC threads and Class 2B fit enabling faster assembly while maintaining precision
• Standard external hex design for compatibility with common wrenching tools and simplified maintenance procedures
• Environmental compliance assurance meeting REACH and RoHS 3 standards for responsible manufacturing and global acceptance

Professional Applications & Engineering Value

This Grade 8 heavy-duty locknut delivers critical vibration resistance where conventional fasteners fail. The nylon insert locking mechanism creates consistent friction against mating threads, preventing loosening under dynamic loads while accommodating thermal expansion up to 220°F. Engineered with coarse UNC threads and Class 2B fit, it provides optimal engagement in high-vibration environments like heavy machinery, automotive assemblies, and construction equipment. The black-oxide steel construction offers superior corrosion resistance compared to plain finishes, extending service intervals in industrial settings. The standard external hex profile ensures compatibility with common torque tools, streamlining maintenance procedures while the 1 1/4"-7 thread size accommodates substantial load requirements in structural applications.

Specification Summary & Compliance

This locknut features 1 1/4"-7 UNC coarse threads with Class 2B thread fit for reliable engagement and vibration resistance. Manufactured from Grade 8 steel with black-oxide finish for corrosion protection, it incorporates a nylon insert rated to 220°F maximum temperature. The external hex drive measures 2 1/64" across flats with 1 41/64" height. The product complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring regulatory acceptance for industrial applications worldwide.