S-91845A235 1 1/4"-12 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh or humid environments.
• Exceptional thread engagement and vibration resistance from the UNF fine thread design, ensuring long-term joint integrity.
• Reliable and predictable installation with a Class 2B thread fit, providing consistent clamping force.
• Broad compatibility and easy installation with a standard external hex drive and right-hand thread, fitting common tools and applications.
• Robust mechanical strength from the standard hex nut profile, capable of withstanding high torque and heavy-duty use.
• Compliance with strict environmental regulations, being RoHS 3 and REACH compliant for safe and responsible industrial use.
• Precision dimensional accuracy in inch measurements, ensuring a perfect fit with mating 1 1/4"-12 UNF components.

Professional Applications & Engineering Value

This 1 1/4"-12 UNF fine thread hex nut is engineered to solve critical challenges in industrial assembly. The 18-8 Stainless Steel material provides excellent resistance to oxidation and chemical exposure, making it a top choice for marine, chemical processing, and food-grade equipment where corrosion resistance is non-negotiable. The UNF fine thread offers a greater number of threads per inch compared to coarse threads, resulting in superior resistance to loosening under vibration and allowing for finer adjustment in precision assemblies. Combined with a Class 2B thread fit, it ensures a secure, reliable connection that maintains its integrity in heavy-duty and high-stress applications, from machinery frames to structural supports.

Specification Summary & Compliance

This hex nut conforms to the Unified National Fine (UNF) thread standard with a 1 1/4"-12 fine thread and a Class 2B thread fit for consistent, free-spinning assembly. Manufactured to standard inch dimensions, it features a right-hand thread direction and an external hex drive. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its adherence to environmental safety and hazardous substance restrictions for industrial components.