S-90268A325 1/4"-28 x 7/8" Coupling Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life
• Precise thread engagement with Class 2B thread fit ensuring reliable connections and reduced risk of cross-threading
• Easy installation and removal thanks to the external hex drive design, compatible with standard wrenches
• Full threading along the entire 7/8" length provides maximum grip and uniform load distribution
• Fine UNF thread (1/4"-28) delivers enhanced vibration resistance and secure fastening in dynamic applications
• Compliance with RoHS 3 and REACH standards ensures environmental safety and regulatory acceptance for industrial use
• Standard coupling nut profile offers versatility for joining threaded rods or bolts in various assemblies

Professional Applications & Engineering Value

This 1/4"-28 UNF coupling nut in 18-8 stainless steel is engineered to address critical challenges in industrial and mechanical systems, such as corrosion in humid or chemical-exposed environments. The fully threaded design and Class 2B thread fit ensure consistent, high-strength connections that resist loosening under vibration, making it ideal for machinery, automotive, and construction applications. Its external hex drive allows for quick assembly with common tools, reducing downtime. By combining durable materials with precise fine threading, this coupling nut provides reliable performance in demanding setups, from equipment frames to precision instruments.

Specification Summary & Compliance

This coupling nut adheres to UNF fine thread standards with a Class 2B thread fit for consistent dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free of hazardous substances. Manufactured with a standard profile, it features a 3/8" width and 7/8" length for uniform performance in industrial fastening applications.