S-98667A230 5/16"-18 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion protection with black corrosion-resistant coating extends service life in harsh industrial environments
• Reliable thread engagement with Class 2B thread fit ensures consistent fastening performance and vibration resistance
• Easy installation and removal through external hex drive design compatible with standard wrench tools
• Enhanced durability from steel construction withstands heavy-duty mechanical stresses and repeated use
• Wide compatibility with 5/16"-18 UNC coarse threads matches common industrial fastener systems
• Regulatory compliance with RoHS 3 standards meets environmental requirements for industrial applications
• Complete thread protection with standard cap nut profile shields threads from damage and contamination

Professional Applications & Engineering Value

This black corrosion-resistant steel cap nut delivers exceptional performance in demanding industrial settings where fastener integrity is critical. The UNC coarse thread design provides rapid installation and superior resistance to vibration loosening, making it ideal for machinery, equipment assembly, and structural applications. The external hex drive enables high-torque installation without compromising the fastener's integrity, while the corrosion-resistant coating protects against moisture, chemicals, and environmental degradation. Engineered with Class 2B thread fit, this cap nut maintains precise tolerances for consistent clamping force distribution, preventing joint failure in high-stress applications. The combination of robust steel construction and specialized surface treatment makes this fastener particularly valuable for automotive, construction, and manufacturing sectors where reliability and longevity are paramount.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit for optimal engagement with mating components. Features 5/16"-18 UNC coarse threads with right-hand thread direction and standard cap nut profile. Compliant with RoHS 3 (2015/863/EU) regulations with exemption 6(a) for lead as an alloying element in steel. The external hex drive (1/2" width) and 17/32" height provide standardized installation compatibility across industrial applications.