S-91875A101 2-56 Cap Nuts
Cap Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh environments
- Reliable thread engagement with Class 2B thread fit ensuring consistent performance and vibration resistance
- Quick installation and removal through external hex drive design compatible with standard tools
- Enhanced protection with closed-end cap design preventing contamination and moisture ingress
- Optimized for industrial use with coarse UNC threads providing excellent assembly speed and debris tolerance
- Precise dimensional control with 1/4" width and height maintaining compatibility across fastener systems
- Environmental compliance meeting RoHS 3 standards for responsible manufacturing practices
Professional Applications & Engineering Value
This 2-56 UNC cap nut delivers critical performance advantages in demanding industrial settings where corrosion resistance and thread reliability are paramount. The zinc-plated steel construction provides essential protection against oxidation and chemical exposure, significantly extending component lifespan in manufacturing equipment, electrical enclosures, and automotive assemblies. The coarse thread spacing combined with Class 2B thread fit ensures rapid installation while maintaining secure fastening under vibration and dynamic loads. The external hex drive configuration offers superior torque transmission compared to internal drive alternatives, reducing tool slippage and installation damage. The closed-end design provides both aesthetic finishing and critical protection against contaminants, making these industrial cap nuts ideal for applications where both performance and appearance matter.
Specification Summary & Compliance
Manufactured to precise dimensional standards with 1/4" width and 1/4" height, this cap nut features 2-56 UNC coarse threads with Class 2B thread fit per ASME/ANSI specifications. The right-hand thread direction and external hex drive conform to industry-standard fastening systems. Compliance includes RoHS 3 (2015/863/EU) certification with exemption 6(a)-I for lead as an alloying element in steel, ensuring environmental responsibility while maintaining mechanical performance requirements for industrial applications.
