S-97135A038 1"-8 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism that prevents loosening under dynamic loads
• Exceptional strength and durability with Grade 8 classification, making it suitable for heavy-duty industrial applications
• High-temperature performance with nylon insert rated for continuous service up to 220°F (104°C)
• Enhanced corrosion protection through zinc yellow-chromate plating that extends service life in harsh environments
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy assembly
• Optimized for coarse thread applications using 1"-8 UNC thread pattern for faster installation and reduced cross-threading risk
• Standard external hex design for compatibility with common wrenching tools and straightforward installation

Professional Applications & Engineering Value

This Grade 8 nylon insert locknut delivers critical vibration resistance in demanding mechanical systems where secure fastening is paramount. The nylon insert locking mechanism creates consistent friction against mating threads, effectively preventing rotational loosening caused by machinery vibrations, impact loads, or thermal cycling. Engineered with coarse UNC threads and Class 2B thread fit, this heavy-duty fastener ensures reliable performance in construction equipment, automotive assemblies, industrial machinery, and transportation applications. The zinc yellow-chromate plated steel construction provides dual protection against corrosion while maintaining the high tensile strength required for critical connections. With its 220°F temperature rating, this locknut maintains locking integrity in elevated temperature environments where ordinary locking fasteners might fail.

Specification Summary & Compliance

This heavy-duty locknut features 1"-8 UNC coarse threads with Class 2B thread fit per ASME B1.1 standards, ensuring precise dimensional accuracy and reliable thread engagement. The external hex design (1 7/16" width) conforms to standard wrenching specifications, while the 1 3/64" height provides optimal profile for high-strength applications. Manufactured from Grade 8 steel with zinc yellow-chromate plating for corrosion resistance, this fastener meets industry standards for heavy-duty mechanical fasteners. The nylon insert locking element is rated for continuous service up to 220°F maximum temperature. Compliant with RoHS and REACH environmental regulations for industrial use.