S-91851A660 1 1/4"-7 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced load distribution from the extra-wide thin profile, reducing surface pressure and material stress
• Quick assembly efficiency with coarse UNC threading and Class 2B fit for faster installation
• Exceptional durability in heavy-duty applications thanks to the 2" width and robust external hex drive
• Reliable performance with right-hand thread direction ensuring secure fastening in dynamic conditions
• Regulatory compliance meeting RoHS 3 and REACH standards for safe, sustainable industrial use
• Optimized space utilization with 23/32" low-profile height, perfect for confined assembly areas

Professional Applications & Engineering Value

This extra-wide thin hex nut delivers critical engineering advantages in demanding applications. The 18-8 stainless steel provides excellent corrosion resistance for outdoor machinery, chemical processing equipment, and marine installations where environmental factors degrade ordinary fasteners. Its UNC coarse thread design prevents cross-threading during high-speed assembly while maintaining vibration resistance in heavy machinery and structural frameworks. The Class 2B thread fit ensures consistent engagement without binding, reducing installation time in production lines. The unique extra-wide thin profile distributes clamping force across broader surfaces, preventing distortion in sheet metal assemblies and composite materials. These features make it indispensable for industrial maintenance, construction equipment, and transportation infrastructure requiring corrosion-resistant nuts with reliable performance under sustained loads.

Specification Summary & Compliance

Manufactured to precise inch system standards with 1 1/4"-7 UNC coarse thread and Class 2B thread fit tolerances for consistent performance. Complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and material restrictions adherence. Dimensions include 2" width and 23/32" height with external hex drive configuration for standard tool compatibility.