S-97135A411 1 3/4"-8 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism that maintains secure fastening in high-motion environments
• Exceptional strength and durability with Grade 8 classification, ensuring reliable performance in heavy-duty applications
• Enhanced corrosion protection from zinc yellow-chromate plating that extends service life in harsh industrial conditions
• High-temperature capability with nylon insert rated for maximum 220°F operation, maintaining locking integrity in thermal cycling
• Precision thread engagement with UNC coarse threads and Class 2B fit for quick installation and consistent torque performance
• Standard hex profile for compatibility with common tools and straightforward installation in confined spaces
• Right-hand threading following industry standards for intuitive assembly and maintenance procedures

Professional Applications & Engineering Value

This Grade 8 heavy-duty nylon insert locknut delivers critical vibration resistance in demanding industrial environments where fastener loosening can compromise safety and operational integrity. The zinc yellow-chromate plated steel construction provides superior corrosion protection for extended service life in manufacturing facilities, heavy machinery, and outdoor equipment applications. The UNC coarse thread profile ensures rapid installation while maintaining secure fastening, particularly valuable in maintenance scenarios where time efficiency is crucial. With its 220°F maximum temperature rating, this locknut performs reliably in engine components, industrial motors, and equipment experiencing thermal cycling, preventing costly downtime from fastener failure. The combination of external hex drive and Class 2B thread fit guarantees consistent torque application and reliable seating across multiple installation cycles.

Specification Summary & Compliance

This locknut features precision 1 3/4"-8 UNC coarse threads with Class 2B thread fit ensuring proper engagement and consistent performance. Manufactured to meet Grade 8 strength requirements with dimensions of 2 49/64" width and 2 5/16" height. The nylon insert locking mechanism maintains integrity up to 220°F maximum temperature. Complies with industry standards for external hex locknuts and features right-hand thread direction following established fastening conventions. The zinc yellow-chromate plating provides corrosion resistance while meeting environmental compliance requirements for industrial applications.