S-91849A128 1/4"-28 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Enhanced torque distribution and reduced surface pressure due to the extra wide profile, minimizing the risk of damage to connected materials.
• Secure and precise fastening with Class 2B fine UNF threads, ensuring a reliable fit and vibration resistance in critical assemblies.
• High-strength external hex drive allows for easy installation and removal with standard tools, improving assembly efficiency.
• Compliance with major environmental regulations including RoHS 3 and REACH, making it suitable for global supply chains and sensitive applications.
• Right-hand thread design provides standard, intuitive installation for common industrial and maintenance procedures.
• Durable and maintenance-free performance thanks to the stainless steel material, reducing long-term replacement costs.

Professional Applications & Engineering Value

This 1/4"-28 UNF extra wide hex nut is engineered to address common challenges in industrial fastening, such as material fatigue and loosening under dynamic loads. The 18-8 Stainless Steel offers excellent resistance to corrosion and oxidation, making it ideal for outdoor, marine, or chemical processing equipment where moisture and chemicals are present. The extra wide hex profile distributes clamping force over a larger area, reducing the risk of surface indentation on soft materials and providing a more stable connection. Combined with Class 2B fine threads, this nut ensures a tight, precise fit that resists vibration-induced loosening in machinery, automotive, and aerospace assemblies. Its external hex drive facilitates quick installation with common wrenches, streamlining maintenance and reducing downtime in production environments.

Specification Summary & Compliance

This hex nut features a 1/4"-28 UNF fine thread with Class 2B thread fit for consistent, accurate engagement. Dimensions include a width of 1/2" and height of 15/64", adhering to standard inch measurements. It is manufactured from 18-8 Stainless Steel and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.