S-91875A130 1/4"-20 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion protection with zinc plating that extends service life in harsh industrial environments
• Reliable thread engagement with Class 2B fit ensuring consistent fastening performance and vibration resistance
• Quick installation and removal through external hex drive design compatible with standard wrench tools
• Enhanced durability from steel construction capable of withstanding heavy-duty mechanical stress
• Wide compatibility with UNC 1/4"-20 coarse threads matching common industrial components
• Regulatory compliance meeting RoHS 3 standards for environmentally responsible manufacturing
• Complete thread coverage with 1/4" depth providing secure end protection for bolt threads

Professional Applications & Engineering Value

These zinc-plated steel cap nuts deliver critical sealing and protective functions in demanding applications where exposed threads pose contamination or safety risks. The UNC coarse thread configuration maintains reliable performance in high-vibration environments common in machinery, automotive assemblies, and structural frameworks. Engineers specify this external hex cap nut for its combination of corrosion resistance and mechanical strength, particularly when RoHS compliance is mandatory for industrial equipment. The standardized 1/4"-20 thread size ensures interchangeability across existing fastening systems while the Class 2B thread fit guarantees consistent clamping force without galling or cross-threading issues during repeated maintenance cycles.

Specification Summary & Compliance

Manufactured to precise dimensional standards with 7/16" width and 15/32" height profiles. Features UNC coarse threads with Class 2B tolerance for optimal thread engagement. Complies with RoHS 3 (2015/863/EU) regulations under exemption 6(a)-I for lead as steel alloying element. The right-hand thread direction and standard cap nut profile ensure compatibility with industry-standard installation practices and tooling.