S-94895A591 1 1/4"-12 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional tensile strength with Grade 8 classification, ensuring reliable performance in high-stress industrial applications
• Superior corrosion resistance from the black-oxide steel finish, extending service life in harsh environments
• Precise thread engagement with Class 2B fit and UNF fine threads, reducing vibration loosening and improving assembly integrity
• Heavy-duty construction with a 1 7/8" width and 1 1/16" height, providing robust load distribution and stability
• Standard external hex drive design for easy installation using common tools, saving time and labor costs
• Compliance with RoHS 3 and REACH regulations, ensuring environmental safety and meeting global supply chain requirements
• Right-hand thread direction for straightforward installation in standard machinery and equipment setups

Professional Applications & Engineering Value

This Grade 8 black-oxide steel hex nut is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where vibration resistance and long-term durability are paramount. The UNF fine thread design enhances clamping force distribution, minimizing the risk of fatigue failure under dynamic loads. Paired with a Class 2B thread fit, it ensures consistent torque accuracy and reduces the need for re-tightening in industrial fastening systems. The black-oxide coating provides a protective barrier against moisture and chemicals, making it ideal for outdoor or corrosive environments. By integrating high-strength materials with precision threading, this nut delivers reliable performance in demanding applications such as structural frameworks, engine components, and heavy equipment manufacturing.

Specification Summary & Compliance

This hex nut adheres to UNF thread standards with a size of 1 1/4"-12 and Class 2B thread fit for precise dimensional accuracy. It meets Grade 8 strength requirements, ensuring high tensile and yield strength for heavy-duty use. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its environmental and safety conformity. Dimensions include a width of 1 7/8" and height of 1 1/16", with right-hand thread direction and external hex drive style for standardized installation.