S-93776A441 5/16"-18 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through serrated locking technology that bites into mating surfaces to prevent loosening under dynamic loads
• Enhanced corrosion protection with 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications
• Integrated flange design eliminates need for separate washers, providing wider bearing surface and faster installation
• Reliable thread engagement with UNC coarse threads and Class 2B fit ensuring consistent performance and easy assembly
• External hex drive allows for standard wrench access and high torque application during installation
• Compliance assurance with REACH and RoHS 3 regulations for safe use across various industrial sectors
• Durable construction maintains locking performance through multiple installation cycles without degradation

Professional Applications & Engineering Value

This 5/16"-18 serrated flange lock nut delivers critical vibration resistance in demanding applications where fastener integrity is paramount. The 18-8 stainless steel construction provides excellent corrosion resistance for machinery exposed to moisture, chemicals, or outdoor elements. The serrated locking mechanism creates permanent friction against mating surfaces, making it ideal for automotive assemblies, industrial equipment, and structural frameworks subjected to constant vibration or thermal cycling. The integrated 43/64" flange distributes clamping force over a wider area, reducing surface pressure and preventing damage to softer materials. With UNC coarse threads facilitating quick assembly and the external hex drive enabling high-torque installation, this fastener combines reliability with efficiency in production environments.

Specification Summary & Compliance

This flange lock nut features 5/16"-18 UNC coarse threads with Class 2B thread fit for consistent engagement and reliable performance. Manufactured from 18-8 stainless steel with standard hex profile and external drive style. The nut meets REACH (EC 1907/2006) compliance and RoHS 3 (2015/863/EU) standards, ensuring environmental responsibility and workplace safety. Dimensions include 43/64" flange diameter, 1/2" width across flats, and 9/32" height for standardized application across industrial fastening systems.