S-98858A558 1/4"-20 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion protection with black corrosion-resistant coating that extends service life in harsh industrial environments
• Heavy-duty performance guaranteed by Grade 5 steel construction, providing reliable strength for demanding applications
• Quick installation and removal through external hex drive design combined with UNC coarse threading
• Precise thread engagement with Class 2B fit ensuring consistent performance and vibration resistance
• Enhanced safety and aesthetics from the cap nut design that covers exposed thread ends while providing a finished look
• Environmental compliance meeting RoHS 3 standards for responsible manufacturing and supply chain requirements
• Optimal dimensional compatibility with 1/4"-20 thread size and 7/16" width fitting standard industrial components

Professional Applications & Engineering Value

This Grade 5 steel cap nut delivers exceptional engineering value through its black corrosion-resistant coating that significantly reduces maintenance frequency in corrosive environments. The UNC coarse thread configuration with Class 2B fit provides reliable fastening in high-vibration applications common in machinery, automotive, and construction equipment. The external hex drive enables efficient installation with standard tools, while the cap nut profile protects threads from damage and prevents snagging in exposed locations. Engineered for industrial fastening solutions, this component addresses critical needs for durability, corrosion protection, and consistent performance in demanding operational conditions where fastener failure is not an option.

Specification Summary & Compliance

This cap nut features precision 1/4"-20 UNC coarse thread with Class 2B thread fit for optimal engagement and vibration resistance. Manufacturing complies with Grade 5 strength standards and dimensional specifications including 7/16" width and 15/32" height. The product is RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel, meeting international environmental regulations for industrial components.