S-90659A104 1/2"-13 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through serrated locking technology that prevents loosening under dynamic loads
• Enhanced load distribution with 1-13/64" flange diameter, reducing surface pressure and material stress
• Corrosion-resistant zinc plating provides durable protection in demanding industrial environments
• Reliable coarse thread engagement with UNC 1/2"-13 threading for faster assembly and reduced cross-threading risk
• Precision Class 2B thread fit ensures consistent torque performance and secure fastening
• Standard external hex drive allows for easy installation using common wrench tools
• Full regulatory compliance with REACH and RoHS 3 standards for safe, environmentally responsible manufacturing

Professional Applications & Engineering Value

This zinc-plated steel flange lock nut delivers critical vibration resistance in heavy machinery, automotive assemblies, and structural applications where dynamic loads threaten joint integrity. The serrated locking mechanism creates permanent resistance to rotational loosening, eliminating the need for secondary locking devices. The 1-13/64" flange diameter distributes clamping force across wider surface areas, preventing damage to softer materials while maintaining joint stability. Engineered with UNC coarse threads and Class 2B thread fit, this fastener combines rapid installation with precise torque control, making it ideal for production environments requiring both speed and reliability. The external hex drive accommodates standard tools while the corrosion-resistant zinc plating ensures long-term performance in challenging conditions.

Specification Summary & Compliance

This flange lock nut features 1/2"-13 UNC coarse threads with Class 2B thread fit for consistent engagement and reliable performance. The external hex drive (3/4" width) and standard hex nut profile ensure compatibility with common installation tools. Manufacturing complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, confirming the absence of restricted substances. The flange diameter of 1-13/64" with 0.06" thickness provides optimal load distribution characteristics for industrial applications requiring vibration-resistant fastening solutions.