S-98858A103 3/8"-16 Cap Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc plating, extending service life in demanding industrial environments.
• Superior load-bearing capacity from Grade 5 steel construction, ensuring reliable performance under high stress.
• Secure and efficient installation with an external hex drive, allowing for high torque application without slippage.
• Optimal thread engagement with a Class 2B fit and coarse UNC threads, reducing cross-threading risks and speeding up assembly.
• Complete thread protection and aesthetic finish provided by the standard cap profile, safeguarding threads from damage and debris.
• Compliance with environmental standards via RoHS 3, meeting regulatory requirements for safe use.
• Versatile right-hand threading compatible with standard tools and components for broad application use.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel cap nut is engineered to address common industrial challenges such as vibration loosening and environmental degradation. The 3/8"-16 UNC coarse thread design ensures quick, reliable fastening in heavy machinery, automotive assemblies, and structural frameworks, where high tensile strength and durability are critical. The external hex drive facilitates easy installation with standard wrenches, reducing labor time while the zinc plating offers a protective barrier against rust and corrosion. Ideal for applications requiring a finished look and sealed end, this cap nut enhances both performance and longevity in industrial fastening systems, ensuring consistent operation under dynamic loads.

Specification Summary & Compliance

This cap nut features precise Class 2B thread fit and adheres to UNC coarse thread standards for consistent compatibility. Manufactured from Grade 5 steel with dimensions of 9/16" width and 5/8" height, it meets industry specifications for strength and dimensional accuracy. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I, ensuring environmental safety in line with global regulations.