S-90630A201 9/16"-12 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking technology that maintains secure fastening under dynamic loads
• High-temperature performance with nylon insert rated to 220°F for reliable operation in demanding industrial environments
• Exceptional strength and durability from Grade 8 steel construction, ensuring long-term reliability in heavy-duty applications
• Precise thread engagement with Class 2B thread fit for consistent performance and reduced risk of cross-threading
• Easy installation and removal using standard external hex drive design with familiar 7/8" width for compatibility with common tools
• Coarse thread advantage with UNC 9/16"-12 threading for faster assembly and better performance in materials prone to stripping
• Environmental compliance assurance meeting both REACH and RoHS 3 standards for safe use in regulated industries

Professional Applications & Engineering Value

This Grade 8 steel nylon insert locknut delivers critical vibration resistance in demanding industrial applications where safety and reliability are paramount. The nylon insert locking mechanism creates consistent friction against mating threads, preventing loosening from machinery vibration, impact loads, and thermal cycling. The UNC coarse threading (9/16"-12) provides excellent engagement in various materials while the external hex drive ensures straightforward installation with standard tools. Engineered for heavy-duty equipment, automotive assemblies, and industrial machinery, this locknut maintains its locking capability up to 220°F, making it suitable for applications exposed to moderate heat. The combination of Class 2B thread fit and precision manufacturing ensures reliable performance in critical fastening joints where vibration-induced failure is not an option.

Specification Summary & Compliance

This locknut features 9/16"-12 UNC coarse threading with Class 2B thread fit for precise engagement and optimal performance. Manufactured from Grade 8 steel for high strength requirements, it maintains a standard external hex profile with 7/8" width and 41/64" height. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring safe use across various industrial sectors. The right-hand thread direction and nylon insert locking mechanism provide reliable vibration resistance while meeting industry specifications for heavy-duty locking applications.