S-90098A120 3/8"-16 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism that maintains secure fastening under dynamic loads
• Excellent corrosion resistance provided by 18-8 stainless steel construction for long-lasting performance in harsh environments
• High-temperature durability with nylon insert rated for continuous service up to 250°F (121°C)
• Precise thread engagement ensured by Class 3B thread fit for reliable, consistent performance in critical applications
• Easy installation and removal with standard external hex drive design compatible with common tools
• Space-saving profile through extra-wide thin design that provides full locking performance in confined spaces
• Regulatory compliance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This 3/8"-16 UNC nylon insert locknut delivers exceptional engineering value in demanding industrial environments where vibration loosening poses significant reliability concerns. The 18-8 stainless steel construction provides superior corrosion resistance, making it ideal for applications exposed to moisture, chemicals, or outdoor conditions. The nylon insert locking mechanism creates consistent friction against mating threads, effectively preventing spontaneous loosening from vibration or thermal cycling. The extra-wide thin profile offers maximum locking performance while minimizing axial space requirements, perfect for compact assemblies in machinery, automotive systems, and electrical enclosures. With its 250°F temperature rating and Class 3B thread fit, this locknut maintains reliable performance across diverse operating conditions from manufacturing equipment to transportation systems.

Specification Summary & Compliance

This locknut features 3/8"-16 UNC coarse threads with Class 3B thread fit precision manufacturing, ensuring consistent engagement and reliable performance. The external hex drive design conforms to standard wrenching requirements, while the right-hand thread direction follows conventional fastening practices. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components. Manufactured to exacting dimensional specifications with an 11/16" width and 13/32" height, this locknut delivers reliable performance in inch-system applications requiring secure, vibration-resistant fastening solutions.