S-91875A107 1 1/4"-12 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion protection with zinc-plated steel construction for extended service life in harsh industrial environments
• Precise thread engagement with Class 2B fit ensuring reliable fastening and vibration resistance
• Optimal torque transmission through external hex drive design for secure installation with standard tools
• Enhanced thread integrity with UNF fine thread spacing providing superior holding power in critical applications
• Complete end protection with standard cap nut profile sealing threaded ends against contaminants
• Regulatory compliance assurance meeting RoHS 3 standards for environmentally responsible manufacturing
• Industry-standard compatibility with inch measurement system for seamless integration into existing assemblies

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this 1 1/4"-12 UNF cap nut delivers exceptional performance where reliability is paramount. The zinc-plated steel construction provides critical corrosion resistance, extending service life in manufacturing, heavy equipment, and structural applications. The Class 2B thread fit ensures precise mating with mating components, eliminating play and maintaining clamping force under vibration. With external hex drive compatibility, installation and maintenance are streamlined using standard tools, while the fine thread spacing offers superior resistance to loosening in high-stress applications. The cap design effectively seals threaded ends, protecting against moisture, debris, and environmental contaminants that compromise fastener integrity.

Specification Summary & Compliance

This precision cap nut features 1 1/4"-12 UNF fine threading with Class 2B tolerance for optimal fit. Manufactured to UNF thread standards with right-hand threading direction and standard profile design. Compliant with RoHS 3 (2015/863/EU) regulations under exemption 6(a)-I for lead as alloying element in steel. Dimensions include 1 13/16" width and 1 61/64" height with full 1 1/4" thread depth for secure fastening applications.