S-90477A121 M8 Flange Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel coating, extending service life in demanding industrial environments
• Superior load distribution through 19 mm steel flange, reducing surface pressure and preventing material damage
• Reliable thread engagement with Class 6H metric thread fit, ensuring precise mating with mating components
• Quick installation using standard 14 mm external hex drive, compatible with common wrench tools
• Optimized rotating performance for applications requiring consistent movement under load
• Secure coarse thread design with 1.25 mm pitch, providing vibration resistance in dynamic conditions
• Environmental compliance meeting RoHS 3 standards for responsible manufacturing

Professional Applications & Engineering Value

This M8 black-oxide steel flange nut delivers critical engineering advantages in industrial assembly where vibration resistance and corrosion protection are paramount. The integrated 19 mm steel flange eliminates the need for separate washers, distributing clamp load over a wider area to prevent surface damage on softer materials. The Class 6H metric thread fit ensures precise engagement with mating bolts, maintaining joint integrity in high-vibration environments like machinery, automotive systems, and structural frameworks. The black-oxide surface treatment provides substantial corrosion resistance without significantly altering dimensions, making it ideal for applications where both protection and dimensional accuracy are essential. With its coarse thread pitch and external hex drive, this nut offers rapid installation and reliable performance in production line settings.

Specification Summary & Compliance

This metric flange nut features M8 x 1.25 mm coarse threads with Class 6H thread fit per ISO standards, ensuring dimensional precision and interchangeability. The external hex drive measures 14 mm across flats with 11.1 mm height, while the integrated steel flange provides 19 mm diameter and 3.6 mm thickness. Manufactured from black-oxide steel, the component is RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel, meeting international environmental regulations for industrial components.