S-90100A102 5/16"-18 Cap Nuts

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with Grade 8 strength rating, ideal for high-stress industrial applications
• Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh environments
• Secure fastening performance with Class 2B thread fit ensuring consistent engagement and vibration resistance
• Easy installation and removal via external hex drive design compatible with standard wrench tools
• Reliable thread compatibility with 5/16"-18 UNC coarse threads for quick assembly and reduced cross-threading risks
• Enhanced safety compliance meeting RoHS 3 standards for regulated industrial applications
• Optimal dimensional stability with precise 1/2" width and 17/32" height for consistent fit in assembly designs

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 cap nut delivers exceptional mechanical performance where vibration resistance and structural integrity are critical. The zinc-plated steel construction provides essential corrosion protection for machinery, automotive assemblies, and construction equipment operating in demanding environments. Featuring 5/16"-18 UNC coarse threads with Class 2B thread fit, this external hex drive cap nut ensures reliable fastening in high-vibration settings while preventing thread damage during repeated installations. The combination of high-strength material and precision thread spacing makes it an ideal solution for structural connections, equipment maintenance, and manufacturing applications requiring durable fastener solutions.

Specification Summary & Compliance

This cap nut maintains Class 2B thread fit tolerance per UNC standards with 5/16"-18 coarse thread specification. Manufactured from zinc-plated steel with external hex drive configuration measuring 1/2" width and 17/32" height. Compliant with RoHS 3 (2015/863/EU) standards under exemption 6(a)-I for lead as alloying element in steel, ensuring environmental regulation adherence for industrial fastener applications.