S-98667A101 4-40 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion protection with black corrosion-resistant coating for extended service life in harsh environments
• Reliable thread engagement with Class 2B thread fit ensuring consistent fastening performance
• Quick installation capability through external hex drive design for efficient assembly operations
• Enhanced durability from steel construction capable of withstanding industrial stress conditions
• Industry-standard compatibility with 4-40 UNC coarse threads for broad application versatility
• Optimized dimensional stability with precise 1/4" width and height for consistent fitment
• Environmental compliance assurance meeting RoHS 3 standards for responsible manufacturing

Professional Applications & Engineering Value

This heavy-duty 4-40 UNC coarse thread cap nut delivers exceptional engineering value through its black corrosion-resistant-coated steel construction, specifically designed to combat degradation in demanding industrial settings. The external hex drive configuration enables rapid installation and removal cycles, significantly reducing maintenance downtime in production environments. With its Class 2B thread fit and standardized UNC coarse threading, this fastener provides reliable vibration resistance and secure fastening in machinery, electrical enclosures, and automotive assemblies where corrosion-resistant fasteners are critical for long-term operational integrity. The combination of robust material properties and precision manufacturing ensures consistent performance in applications requiring both mechanical strength and environmental protection.

Specification Summary & Compliance

This cap nut features precision 4-40 UNC coarse threads with Class 2B thread fit for optimal engagement, manufactured to standard dimensional specifications with 1/4" width, 1/4" height, and 5/32" thread depth. The product complies with RoHS 3 (2015/863/EU) standards with exemption 6(a) for lead as an alloying element in steel, ensuring environmental regulatory adherence for industrial applications requiring compliant steel hex nuts and corrosion-resistant fastening solutions.