S-91030A455 7/8"-14 Flange Nuts

Key Features & Benefits at a Glance

• Enhanced vibration resistance through the integrated flange design that distributes load over a wider surface area
• Superior corrosion protection with black-oxide steel construction for extended service life in demanding environments
• Precise thread engagement with Class 2B fine threads ensuring reliable, secure fastening connections
• Optimized torque transmission via standard external hex profile for efficient installation with common tools
• Increased bearing surface with 1-3/4" flange diameter reducing surface pressure and preventing material damage
• Environmental compliance meeting RoHS 3 standards for responsible manufacturing and global acceptance
• Right-hand threading compatibility with standard UNF fine thread patterns for broad application versatility

Professional Applications & Engineering Value

This black-oxide steel flange nut delivers exceptional engineering value in applications where vibration resistance and corrosion protection are critical. The 1-3/4" flange diameter provides superior load distribution, eliminating the need for separate washers while preventing surface damage to assembled components. The UNF fine thread pattern (7/8"-14) offers increased thread engagement and superior resistance to loosening under dynamic loads, making it ideal for heavy machinery, automotive assemblies, and industrial equipment. The black-oxide surface treatment creates a durable barrier against moisture and environmental contaminants, while the external hex drive ensures compatibility with standard wrenching tools for efficient installation and maintenance procedures in manufacturing and repair facilities.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit ensuring consistent performance across applications. Features UNF thread specification (7/8"-14) with right-hand direction and fine thread spacing. The flange nut maintains 1-3/4" diameter with 0.25" thickness and standard hex profile. Fully RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel, meeting international environmental standards for industrial fasteners.