S-91849A660 5/8"-18 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications.
• Enhanced load distribution and reduced risk of loosening due to the extra wide hex profile, providing greater stability under heavy loads.
• Precise and reliable thread engagement with Class 2B thread fit, ensuring smooth assembly and minimizing cross-threading issues.
• Excellent vibration resistance from UNF fine threading, maintaining secure fastening in high-stress and dynamic applications.
• Easy installation and removal with external hex drive design, allowing for standard wrench tools and reducing assembly time.
• Compliance with strict environmental regulations, meeting RoHS 3 and REACH standards for safe and sustainable use in global markets.
• Durable and long-lasting performance in heavy-duty applications, thanks to the robust material and precise dimensional accuracy.

Professional Applications & Engineering Value

This 5/8"-18 UNF extra wide hex nut is engineered to address common challenges in industrial settings, such as vibration-induced loosening and corrosion degradation. Made from 18-8 stainless steel, it offers exceptional resistance to rust and chemical exposure, making it suitable for machinery, construction, and marine applications. The fine thread spacing and Class 2B thread fit ensure tight, secure connections that withstand dynamic loads and thermal cycling. With an external hex drive and extra wide profile, it facilitates quick installation using standard tools, reducing downtime and maintenance costs. Ideal for heavy-duty fastening in automotive, aerospace, and structural assemblies, this nut delivers reliable performance where precision and durability are critical.

Specification Summary & Compliance

This hex nut features a 5/8"-18 UNF fine thread with Class 2B thread fit for precise dimensional accuracy and smooth engagement. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material sustainability. The nut is manufactured to standard inch system specifications, with a width of 1-1/16" and height of 39/64", supporting consistent performance in industrial applications.