S-90831A130 5/16"-18 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel construction, ideal for harsh environments and chemical exposure
• Enhanced durability and wear resistance with black-oxide finish, providing long-lasting performance in demanding applications
• Reliable and secure fastening ensured by Class 2B thread fit, reducing the risk of loosening under vibration
• Easy installation and removal with external hex drive and coarse UNC threading, saving time in assembly and maintenance
• Space-saving thin profile design (3/16" height) allowing use in tight or restricted areas without compromising strength
• Compliance with strict environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use
• Broad compatibility with 5/16"-18 UNC male threads, making it versatile for various industrial fastening needs

Professional Applications & Engineering Value

This 5/16"-18 UNC thin hex nut is engineered to address common industrial challenges such as corrosion, space constraints, and vibration-induced failures. Constructed from 316 stainless steel, it offers exceptional resistance to corrosive elements, making it suitable for marine, chemical processing, and outdoor applications. The black-oxide finish adds an extra layer of protection against wear and oxidation, extending the nut's service life. Its thin profile allows for efficient use in compact assemblies, while the coarse thread spacing and Class 2B thread fit ensure quick, secure installations that withstand dynamic loads. Ideal for machinery, automotive, and structural projects, this nut provides reliable performance where precision and durability are critical.

Specification Summary & Compliance

This hex nut adheres to UNC coarse thread standards with a Class 2B thread fit for consistent dimensional accuracy. It meets manufacturing specifications for inch-system fasteners, including a thread size of 5/16"-18 and right-hand thread direction. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use.