S-91875A321 5-40 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance from zinc-plated steel construction, extending service life in harsh industrial environments.
• Reliable fastening performance with Class 2B thread fit, ensuring consistent engagement and reducing assembly errors.
• Easy installation and removal thanks to the external hex drive design, compatible with standard tools for efficient maintenance.
• Robust coarse thread profile (UNC) provides excellent vibration resistance and load distribution in demanding applications.
• Precise dimensional accuracy with 5/16" width and 11/32" height, enabling seamless integration into existing assemblies.
• Environmental compliance assurance through RoHS 3 adherence, meeting global regulatory standards for safe usage.
• Versatile right-hand threading simplifies installation processes while maintaining high tensile strength under stress.

Professional Applications & Engineering Value

Engineered for industrial durability, this 5-40 UNC coarse thread cap nut addresses critical fastening challenges in machinery, automotive, and equipment manufacturing. The zinc-plated steel material combats corrosion and wear, while the Class 2B thread fit minimizes backlash and secures connections in high-vibration settings. Its external hex drive allows for quick torque application, reducing downtime during assembly or repairs. Ideal for enclosures, structural frames, and precision instruments, this nut delivers consistent performance where strength and thread reliability are paramount, ensuring long-term operational integrity without frequent replacements.

Specification Summary & Compliance

This cap nut adheres to UNC coarse thread standards with a Class 2B thread fit for precise dimensional tolerance. Manufacturing follows inch system measurements (5-40 thread size, 5/16" width, 11/32" height) and is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I for lead in steel alloys, ensuring environmental safety and industry regulation alignment.