S-91875A469 6-40 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 through zinc-plated steel construction, extending service life in harsh industrial environments
- Precise Class 2B thread fit ensures smooth assembly and reliable fastening performance with minimal backlash
- Fine thread spacing (UNF) provides enhanced vibration resistance and superior load distribution
- External hex drive design offers excellent torque transmission and easy installation with standard tools
- Standard cap nut profile delivers consistent performance and compatibility with existing fastener systems
- RoHS 3 compliance meets environmental regulations while maintaining mechanical integrity
- Right-hand threading ensures compatibility with standard industrial equipment and simplified maintenance procedures
Professional Applications & Engineering Value
This 6-40 UNF cap nut delivers exceptional engineering value through its zinc-plated steel construction, which provides critical protection against corrosion in demanding industrial settings. The Class 2B thread fit and fine thread spacing work in tandem to prevent loosening under vibration, making it ideal for machinery, automotive assemblies, and electronic enclosures where reliability is paramount. The external hex drive facilitates quick installation and removal while the standard cap nut profile ensures seamless integration with existing fastener systems. These features collectively address common industrial challenges including vibration-induced failure, corrosion degradation, and maintenance accessibility.
Specification Summary & Compliance
This cap nut features precision 6-40 UNF threads with Class 2B thread fit tolerance for consistent mating performance. Manufacturing complies with UNF thread standards and dimensional specifications including 5/16" width and 11/32" height. The product is RoHS 3 (2015/863/EU) compliant with exemption 6(a)-I for lead as an alloying element in steel, ensuring environmental regulation adherence without compromising mechanical properties.
