S-91875A155 3/8"-24 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• Precise thread engagement with Class 2B fit ensuring reliable, vibration-resistant connections in critical applications
• Easy installation and removal through external hex drive design compatible with standard wrench tools
• Enhanced thread integrity with UNF fine thread profile providing superior holding power compared to coarse threads
• Consistent dimensional accuracy with 9/16" width and 5/8" height for predictable performance across assemblies
• Environmental compliance assurance meeting RoHS 3 standards for responsible manufacturing practices
• Right-hand thread orientation for intuitive installation following industry-standard fastening procedures

Professional Applications & Engineering Value

This 3/8"-24 UNF fine thread cap nut delivers exceptional engineering value in demanding industrial settings where vibration resistance and corrosion protection are critical. The zinc-plated steel construction provides a durable barrier against environmental factors, while the Class 2B thread fit ensures consistent engagement without binding or cross-threading issues. The external hex drive configuration allows for high-torque applications using standard tools, making it ideal for machinery assembly, automotive systems, and heavy equipment where fine thread precision enhances joint integrity. The combination of UNF thread standards and robust material properties addresses common failure points in dynamic load applications, providing engineers with a reliable sealing and fastening solution.

Specification Summary & Compliance

This cap nut features 3/8"-24 UNF fine threads with Class 2B thread fit per Unified National Fine standards, ensuring precise dimensional tolerances for consistent performance. The manufacturing complies with RoHS 3 (2015/863/EU) requirements under exemption 6(a)-I for lead as an alloying element in steel. Physical dimensions include 9/16" width across flats and 5/8" total height, providing standardized compatibility with inch-system applications. The right-hand thread direction and external hex drive configuration adhere to industry-standard fastening specifications for reliable integration into existing assemblies.