S-91850A204 1/2"-20 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and extended service life
• Enhanced torque distribution and reduced surface pressure due to the extra wide hex profile, minimizing the risk of damage during tightening
• Secure and precise fit ensured by the Class 2B thread fit, providing reliable engagement with mating components
• Excellent vibration resistance from the 1/2"-20 UNF fine thread design, maintaining clamp load in dynamic applications
• Heavy-duty performance with a robust 7/8" width and 31/64" height, built to withstand high-stress industrial assemblies
• Global environmental compliance with RoHS 3 and REACH standards, ensuring safe and sustainable use in regulated markets
• Easy installation and removal using standard external hex drive tools, streamlining maintenance and assembly processes

Professional Applications & Engineering Value

This 1/2"-20 UNF hex nut is engineered to solve critical challenges in demanding industrial settings. The 316 Stainless Steel material provides exceptional resistance to corrosive elements like chlorides and acids, making it a top choice for marine, chemical processing, and outdoor infrastructure applications. Its extra wide profile significantly increases the bearing surface, distributing clamping force more evenly to prevent joint loosening under vibration and thermal cycling. The fine thread and Class 2B thread fit offer superior adjustment precision and holding power, essential for high-integrity assemblies in machinery, heavy equipment, and transportation systems where reliability is non-negotiable.

Specification Summary & Compliance

This nut conforms to UNF (Unified National Fine) thread standards with a Class 2B thread fit for consistent dimensional accuracy. Key specifications include a 1/2"-20 fine thread, right-hand thread direction, external hex drive, and inch system measurements (Width: 7/8", Height: 31/64"). The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, affirming its suitability for global industrial supply chains.