S-91845A355 7/8"-20 Hex Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance with extra fine 7/8"-20 UNEF threading, ensuring secure fastening in high-motion environments
• Exceptional corrosion resistance from 18-8 Stainless Steel construction, ideal for harsh or outdoor industrial settings
• Precise Class 2B thread fit for smooth assembly and reliable engagement with mating components
• Standard external hex drive design for easy installation using common wrenches, reducing assembly time
• Durable inch-system compatibility ensuring seamless integration with existing US-standard machinery and parts
• Full regulatory compliance with RoHS 3 and REACH standards, meeting global environmental and safety requirements
• Right-hand thread direction for straightforward, intuitive installation in standard applications

Professional Applications & Engineering Value

This 7/8"-20 UNEF Class 2B hex nut delivers critical performance in precision assemblies where vibration loosening is a concern. The extra fine thread spacing provides more threads per inch, significantly enhancing clamp load distribution and resistance to shock and dynamic loads. Manufactured from 18-8 Stainless Steel, it offers reliable corrosion resistance in chemical, marine, or high-humidity environments. The Class 2B thread fit ensures consistent, precise mating with bolts, reducing the risk of cross-threading and assembly errors in automated or manual production lines. Ideal for aerospace components, precision machinery, and industrial equipment requiring vibration-resistant and durable inch-system fasteners.

Specification Summary & Compliance

This hex nut features a 7/8"-20 UNEF extra fine thread with Class 2B tolerance for consistent fit and performance. It adheres to standard inch measurement system specifications with external hex drive. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.