S-91875A106 1 1/4"-7 Cap Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• Superior load distribution through standard cap nut profile design that protects threads and prevents loosening under vibration
• Quick installation and removal with external hex drive that provides excellent torque transmission and tool accessibility
• Reliable thread engagement with Class 2B coarse UNC threads ensuring consistent performance in high-vibration applications
• Heavy-duty protection with full 1 1/4" thread depth that securely covers and seals bolt ends
• Environmental compliance meeting RoHS 3 standards for safe use in regulated industries
• Optimal grip surface with 1 13/16" width providing ample contact area for wrenching tools

Professional Applications & Engineering Value

This zinc-plated steel cap nut delivers critical protection and sealing capabilities for industrial assemblies where exposed threads pose safety risks or contamination concerns. The UNC coarse thread configuration with Class 2B fit ensures rapid installation while maintaining vibration resistance in heavy machinery, structural steel frameworks, and transportation equipment. The external hex drive design allows for high-torque applications without compromising the nut's aesthetic finish, making it ideal for both functional and visible assemblies. The zinc plating provides sacrificial corrosion protection, significantly extending service life in outdoor or chemically aggressive environments where fastener integrity is paramount to operational safety.

Specification Summary & Compliance

Manufactured to precise dimensional standards with 1 1/4"-7 UNC coarse threads and Class 2B thread fit for consistent performance. Features standard external hex drive configuration with 1 13/16" width and 1 61/64" height. Fully compliant with RoHS 3 (2015/863/EU) standards under exemption 6(a)-I for lead as an alloying element in steel, ensuring environmental responsibility while maintaining mechanical performance requirements for industrial applications.