S-90949A214 5/16"-18 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through precision distorted thread locking technology, preventing loosening under dynamic loads
• Enhanced corrosion protection with zinc yellow-chromate plating, extending service life in harsh industrial environments
• Heavy-duty performance meeting Grade G strength classification for demanding automotive and machinery applications
• Integrated flange design with 11/16" diameter distributing load evenly and eliminating need for separate washers
• Optimized torque application through standard external hex drive profile and 1/2" width for secure installation
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance in coarse UNC threading
• Permanent fastening solution combining flange stability with positive locking mechanism for critical assemblies

Professional Applications & Engineering Value

This Grade G flange lock nut delivers exceptional engineering value through its distorted thread locking technology that actively resists vibration-induced loosening - a critical failure point in automotive, heavy machinery, and industrial equipment. The zinc yellow-chromate plated steel construction provides superior corrosion resistance while maintaining the mechanical strength required for permanent fastening applications. The integrated 11/16" flange diameter eliminates washer requirements and distributes clamping force over a wider surface area, preventing material damage and maintaining joint integrity. With 5/16"-18 UNC coarse threading and external hex drive, this heavy-duty fastener ensures reliable installation in high-vibration environments where standard nuts would fail, making it ideal for engine components, conveyor systems, and structural assemblies demanding vibration-resistant solutions.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit for optimal engagement in 5/16"-18 UNC coarse thread applications. Complies with relevant industrial standards for Grade G strength classification and features right-hand thread direction with standard external hex drive configuration. The zinc yellow-chromate plating meets corrosion protection requirements while the distorted thread locking mechanism ensures reliable performance in vibration-prone environments. Dimensions include 11/16" flange diameter, 1/2" width, and 23/64" height for consistent installation across industrial applications.