S-97135A215 1/4"-28 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking that maintains secure fastening in high-motion environments
• Exceptional durability with Grade 8 strength classification, providing reliable performance in heavy-duty applications
• Enhanced corrosion protection from zinc yellow-chromate plating, extending service life in demanding industrial conditions
• High-temperature capability with nylon insert rated to 220°F, ensuring locking performance in elevated temperature scenarios
• Precise thread engagement with Class 2B thread fit and UNF fine threads, delivering consistent clamping force and reduced loosening risk
• Easy installation and removal using standard external hex drive, compatible with common wrench tools for efficient maintenance
• Optimized dimensional stability with 7/16" width and 5/16" height profile, ensuring proper fit in confined spaces

Professional Applications & Engineering Value

This Grade 8 nylon insert lock nut delivers critical vibration-resistant fastening solutions for demanding industrial and automotive applications. The zinc yellow-chromate plated steel construction provides superior corrosion resistance in harsh environments, while the nylon insert locking mechanism maintains tension under continuous vibration and dynamic loads. The 1/4"-28 UNF fine threads with Class 2B fit ensure precise engagement and consistent clamping force, preventing loosening in high-stress scenarios. Engineered to withstand temperatures up to 220°F, this locknut is ideal for engine compartments, machinery, and equipment where thermal cycling and vibration pose significant challenges to fastener integrity. The external hex drive design facilitates quick installation and removal using standard tools, reducing maintenance downtime in production environments.

Specification Summary & Compliance

This locknut features 1/4"-28 UNF fine threads with Class 2B thread fit for precision engagement, manufactured to Grade 8 strength standards for heavy-duty performance. The zinc yellow-chromate plated steel construction meets industry corrosion protection requirements, while the nylon insert is rated for continuous service up to 220°F. The external hex drive (7/16" width) and standard profile (5/16" height) ensure compatibility with standard tooling and applications. Manufactured in compliance with relevant industrial standards for locknuts and fasteners.