S-90477A116 3/4"-16 Flange Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel finish for extended service life in demanding environments
• Superior load distribution through the 1 5/8" flange diameter, reducing surface pressure and material damage
• Precise thread engagement with UNF fine threading (3/4"-16) ensuring reliable, vibration-resistant connections
• Optimized assembly efficiency featuring external hex drive for standard tool compatibility and rotating capability
• Consistent thread quality with Class 2B fit providing smooth installation and reduced cross-threading risk
• Robust mechanical performance from steel construction with 0.28" flange thickness for heavy-duty applications
• Regulatory compliance assurance meeting RoHS 3 standards for environmentally conscious manufacturing

Professional Applications & Engineering Value

This black-oxide steel flange nut delivers critical engineering solutions where vibration resistance and corrosion protection are paramount. The UNF fine thread configuration (3/4"-16) maintains clamping force under dynamic loads, making it ideal for automotive assemblies, heavy machinery, and structural frameworks. The integrated 1 5/8" flange eliminates separate washer requirements while distributing stress across wider surfaces, preventing joint loosening in high-vibration environments. With external hex drive compatibility and rotating functionality, it streamlines maintenance and assembly processes in industrial settings. The black-oxide surface treatment provides a durable barrier against moisture and chemical exposure, extending component lifespan in outdoor or harsh operating conditions.

Specification Summary & Compliance

Manufactured to precise Class 2B thread tolerances with UNF (Unified National Fine) 3/4"-16 threading and right-hand thread direction. The flange nut features a standard hex profile (1 1/4" width) and complies with RoHS 3 (2015/863/EU) regulations under exemption 6(a) for lead as steel alloying element. Dimensions include 1 5/8" flange diameter and 0.28" flange thickness with 1 1/64" overall height, ensuring interchangeability with standard industrial components.