S-91030A035 5/8"-11 Flange Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution with 1-3/8" flange diameter prevents surface damage and reduces the need for separate washers
• Superior corrosion resistance from black-oxide steel finish extends service life in demanding industrial environments
• Reliable thread engagement with Class 2B fit ensures consistent performance and reduces cross-threading risks
• Quick installation through standard external hex profile and coarse UNC threads speeds up assembly processes
• Heavy-duty construction with 0.19" flange thickness provides exceptional vibration resistance in high-stress applications
• Environmental compliance with RoHS 3 standards meets international regulatory requirements for industrial components
• Right-hand thread design offers compatibility with standard industrial equipment and maintenance procedures

Professional Applications & Engineering Value

This heavy-duty flange nut addresses critical challenges in industrial assembly where vibration resistance and corrosion protection are paramount. The black-oxide steel construction creates a protective barrier against moisture and chemicals, significantly extending component lifespan in automotive, construction, and machinery applications. The integrated 1-3/8" flange eliminates washer requirements while distributing clamping force evenly, preventing surface damage to connected materials. With UNC coarse threads and Class 2B thread fit, this external hex nut ensures rapid installation and reliable performance in high-vibration environments, reducing maintenance frequency and downtime. The combination of robust material properties and precision engineering makes this flange nut ideal for structural connections, equipment mounting, and heavy machinery assemblies where failure is not an option.

Specification Summary & Compliance

This flange nut maintains Class 2B thread fit per UNC standards with 5/8"-11 coarse thread spacing and right-hand thread direction. Manufacturing adheres to inch system specifications with 1-3/8" flange diameter and 13/16" height. The component is fully RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel, meeting international environmental regulations for industrial fasteners.