S-90242A454 1/4"-28 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 316 Stainless Steel construction, ideal for harsh or outdoor industrial environments.
• Precise and reliable fastening ensured by the Class 2B thread fit, offering excellent consistency for repetitive assembly.
• Enhanced durability in fine-thread applications due to the 1/4"-28 UNF thread, providing greater adjustment and vibration resistance.
• Easy installation and removal with the standard external hex drive profile, compatible with common wrenches.
• Compliance with strict environmental regulations, being RoHS 3 and REACH compliant for safe and responsible use.
• Optimal strength-to-size ratio with a 7/16" width and 7/32" height, suitable for space-constrained, heavy-duty applications.
• Right-hand thread direction for standard, intuitive tightening in most machinery and equipment.

Professional Applications & Engineering Value

This 1/4"-28 UNF hex nut is engineered to address critical challenges in demanding sectors such as marine, chemical processing, and food machinery, where corrosion resistance and thread reliability are paramount. The Black-Oxide 316 Stainless Steel material provides an extra layer of protection against oxidation and chemical exposure, significantly extending service life in moist or corrosive atmospheres. Its fine thread spacing ensures a tighter seal and better load distribution, reducing the risk of loosening under vibration—common in automotive or aerospace assemblies. By incorporating a Class 2B thread fit, it guarantees consistent engagement with mating bolts, minimizing cross-threading and improving assembly efficiency for high-volume production lines. This nut delivers dependable performance where failure is not an option, supporting industrial applications that demand both mechanical integrity and regulatory compliance.

Specification Summary & Compliance

This hex nut adheres to UNF (Unified National Fine) thread standards with a 1/4"-28 fine thread and Class 2B thread fit for consistent dimensional accuracy. It features a standard external hex drive, right-hand thread direction, and dimensions of 7/16" width and 7/32" height. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.