S-97135A355 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 temperature performance with nylon insert rated for continuous service up to 220°F (104°C)
• Heavy-duty strength certification meeting Grade 8 standards for maximum load-bearing capacity in demanding applications
• Enhanced corrosion protection with zinc yellow-chromate plating that provides long-lasting durability in harsh industrial environments
• Reliable coarse threading with UNC 1 1/4"-7 specification and Class 2B fit for easy installation and consistent performance
• Standard external hex design for compatibility with common wrenching tools and straightforward installation procedures
• Right-hand threading compatibility with standard fastener systems for seamless integration into existing assemblies

Professional Applications & Engineering Value

This Grade 8 heavy-duty nylon insert locknut delivers critical vibration resistance in demanding industrial applications where secure fastening is paramount. The nylon insert locking mechanism creates consistent friction against mating threads, preventing loosening under dynamic loads and vibration – a common failure point in machinery, automotive, and construction equipment. Engineered with UNC coarse threading and Class 2B thread fit, this locknut ensures reliable engagement while accommodating minor misalignments in assembly. The zinc yellow-chromate plated steel construction provides superior corrosion resistance, extending service life in environments exposed to moisture, chemicals, and temperature fluctuations. With its 220°F temperature rating, this fastener maintains integrity in elevated temperature applications where ordinary locking elements might degrade.

Specification Summary & Compliance

This heavy-duty locknut features 1 1/4"-7 UNC coarse threading with Class 2B thread fit for precision engagement and meets Grade 8 strength classification requirements. The external hex drive style conforms to standard wrenching dimensions (1 13/16" width) with a profile height of 1 25/64". Manufacturing complies with relevant industrial standards for nylon insert locknuts, and the zinc yellow-chromate plating provides RoHS and REACH compliant corrosion protection for industrial applications.