S-91845A105 1/4"-28 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh or humid industrial environments.
• Reliable, vibration-resistant fastening achieved with a Class 2B fine thread fit, minimizing the risk of loosening under stress.
• Wide compatibility and easy installation with the standard external hex drive, allowing for use with common wrenches and sockets.
• Precision-engineered UNF fine threads provide a greater number of threads per inch for a stronger, more secure hold in tapped holes.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global industrial supply chains.
• Durable and long-lasting performance due to the material's inherent strength and resistance to rust and oxidation.
• Standard inch dimensions (7/16" width, 7/32" height) ensure easy integration into existing assemblies designed with imperial measurements.

Professional Applications & Engineering Value

This 1/4"-28 UNF hex nut is engineered to solve critical challenges in precision assembly. The 18-8 Stainless Steel material provides excellent resistance to corrosion and oxidation, making it a dependable choice for applications in automotive, marine, and outdoor equipment where exposure to moisture and chemicals is a concern. The fine UNF thread and Class 2B thread fit offer a tighter, more secure engagement compared to coarse threads, which is crucial for maintaining joint integrity in high-vibration environments like machinery and engine components. The external hex drive and standard profile allow for high torque application with standard tools, speeding up assembly and disassembly processes without compromising the fastener's integrity. This combination of material and thread design delivers long-term reliability, reducing maintenance needs and downtime in demanding industrial applications.

Specification Summary & Compliance

This hex nut conforms to UNF (Unified National Fine) thread standards with a Class 2B thread fit, ensuring consistent and precise engagement with mating screws. The dimensional accuracy includes a width of 7/16" and a height of 7/32". The product is manufactured from 18-8 Stainless Steel and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of restricted hazardous substances and safe for use in industrial and consumer goods.