S-97135A408 1 3/4"-5 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the nylon insert that maintains locking force under dynamic loads
• Heavy-duty performance with Grade 8 strength classification for high-stress industrial applications
• Extended temperature durability with nylon insert rated up to 220°F (104°C) for thermal stability
• Enhanced corrosion protection through zinc yellow-chromate plating in harsh environments
• Reliable thread engagement with UNC coarse threading and Class 2B fit for secure fastening
• Easy installation and removal using standard external hex drive with common tools
• Right-hand threading compatibility with standard industrial equipment and components

Professional Applications & Engineering Value

This Grade 8 heavy-duty nylon insert locknut delivers critical vibration resistance in demanding industrial environments where loosening under dynamic loads poses significant safety and performance risks. The nylon insert locking mechanism creates consistent friction against mating threads, maintaining clamp load without damaging threads during installation or removal. The zinc yellow-chromate plating provides superior corrosion resistance, extending service life in exposed or chemically aggressive settings. With UNC coarse threading and Class 2B thread fit, these locknuts ensure reliable engagement in heavy machinery, construction equipment, transportation systems, and manufacturing applications where vibration-induced failure is not an option. The 220°F temperature rating makes them suitable for engine compartments, industrial motors, and processing equipment operating at elevated temperatures.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit and UNC coarse threading (1 3/4"-5) for consistent performance. The external hex drive conforms to standard wrench sizes for compatibility with industrial tools. This locknut meets Grade 8 strength requirements and is manufactured in compliance with industry standards for heavy-duty fasteners. The zinc yellow-chromate plating provides RoHS and REACH compliant corrosion protection while the nylon insert maintains locking capability across the specified temperature range.