S-97135A245 7/16"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon insert locking mechanism, preventing loosening under dynamic loads
• Exceptional corrosion protection through zinc yellow-chromate plating, extending service life in harsh environments
• High-temperature performance with nylon insert rated up to 220°F, maintaining locking integrity in demanding applications
• Heavy-duty strength from Grade 8 steel construction, providing reliable fastening under extreme mechanical stress
• Precise thread engagement with Class 2B UNF fine threads, ensuring secure fit and reduced risk of cross-threading
• Standard hex profile for easy installation and removal using common wrench tools, improving maintenance efficiency
• Right-hand thread design compatible with standard UNF fastening systems, simplifying assembly processes

Professional Applications & Engineering Value

This Grade 8 nylon insert lock nut delivers critical vibration resistance in demanding industrial and automotive environments where secure fastening is paramount. The 7/16"-20 UNF fine thread configuration provides superior holding power compared to coarse threads, while the Class 2B thread fit ensures precise engagement with mating components. The zinc yellow-chromate plated steel construction offers dual protection against corrosion and wear, making these external hex locknuts ideal for heavy machinery, engine components, and structural assemblies subject to constant vibration and thermal cycling up to 220°F. The nylon insert creates consistent friction locking that maintains clamp load without damaging threads, eliminating the need for secondary locking devices and reducing assembly time.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit tolerance for optimal engagement. Complies with UNF (Unified National Fine) thread specifications and features standard external hex drive design. The zinc yellow-chromate plating provides corrosion resistance while meeting industry standards for heavy-duty applications. Material composition and manufacturing processes adhere to relevant industrial specifications for Grade 8 strength classification, ensuring consistent performance in critical fastening applications.