S-90630A202 9/16"-18 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the nylon insert that maintains locking force under dynamic loads, preventing loosening in high-stress environments
• Exceptional mechanical strength with Grade 8 steel construction, providing reliable performance in heavy-duty applications requiring high clamp loads
• Precision thread engagement with Class 2B fit and 9/16"-18 UNF fine threads ensuring secure fastening and reduced risk of cross-threading
• Temperature resilience with nylon insert rated to 220°F (104°C), maintaining locking performance in moderate heat conditions
• Standard external hex design with 7/8" width for compatibility with common tools and straightforward installation
• Regulatory compliance assurance meeting REACH and RoHS 3 standards for environmental safety and industrial use requirements
• Right-hand thread configuration for conventional installation and compatibility with standard UNF threaded components

Professional Applications & Engineering Value

This Grade 8 steel nylon insert locknut delivers critical vibration resistance in demanding industrial environments where fastener integrity is paramount. The nylon insert locking mechanism creates consistent friction against mating threads, effectively dampening vibrational forces that cause conventional nuts to loosen over time. Engineered with 9/16"-18 UNF fine threads and Class 2B thread fit, this locknut provides superior engagement depth and load distribution compared to coarse-thread alternatives. The 220°F temperature rating ensures reliable performance in engine compartments, machinery, and industrial equipment where moderate heat is present. Its heavy-duty construction makes it ideal for automotive, manufacturing, and construction applications where safety-critical connections require maintained clamping force despite continuous vibration and dynamic loading conditions.

Specification Summary & Compliance

This locknut features precision 9/16"-18 UNF fine threads with Class 2B thread fit per UNF standards, ensuring consistent engagement and reliable performance. The 7/8" hex width and 41/64" height provide standard dimensions for tool compatibility. Manufactured from Grade 8 steel for high strength applications, the nut incorporates a nylon insert locking mechanism rated for temperatures up to 220°F. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, meeting current industrial safety standards for hazardous substance restrictions.