S-90949A212 1/4"-20 Flange Nuts

Key Features & Benefits at a Glance

• Vibration-resistant locking through distorted thread technology prevents loosening in high-stress environments
• Enhanced corrosion protection with zinc yellow-chromate plating extends service life in harsh conditions
• Integrated flange design eliminates need for separate washers and distributes load over wider surface area
• Grade G strength classification ensures reliable performance in demanding industrial applications
• Class 2B thread fit provides consistent engagement and smooth assembly with mating components
• UNC coarse threading enables faster installation and reduced cross-threading risks
• External hex drive allows for standard wrench access and secure torque application

Professional Applications & Engineering Value

This Grade G flange locknut with distorted thread locking technology addresses critical vibration-induced loosening challenges in automotive, machinery, and industrial applications. The zinc yellow-chromate plated steel construction provides superior corrosion resistance, making it ideal for environments exposed to moisture, chemicals, and temperature variations. The integrated 9/16" flange distributes clamping force effectively, reducing surface pressure and preventing damage to connected materials. With UNC coarse threads and Class 2B thread fit, this external hex flange nut ensures quick, reliable installation while maintaining consistent locking performance throughout the product lifecycle, eliminating the need for secondary locking devices and reducing maintenance requirements.

Specification Summary & Compliance

Manufactured to precise dimensional standards including 1/4"-20 UNC coarse thread with Class 2B thread fit for consistent mating compatibility. The external hex drive (7/16" width) and 19/64" height provide standard tool engagement. Features 9/16" flange diameter with 0.04" thickness for optimal load distribution. Complies with industry standards for Grade G mechanical properties and right-hand thread orientation. The zinc yellow-chromate plating meets corrosion protection requirements while maintaining environmental compliance with RoHS and REACH regulations.