S-90949A232 1/2"-20 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted thread locking technology that maintains clamp force in high-stress applications
• Enhanced load distribution with 1 1/16" flange diameter that reduces surface pressure and prevents material damage
• Reliable Grade G strength rating ensures consistent performance in demanding industrial environments
• Precise Class 2B thread fit provides smooth assembly while maintaining secure fastening integrity
• Corrosion-resistant black-oxide steel extends service life and maintains appearance in various operating conditions
• External hex drive design allows for standard tool compatibility and straightforward installation
• Full regulatory compliance with REACH and RoHS 3 standards for global industrial applications

Professional Applications & Engineering Value

This Grade G flange lock nut with distorted thread technology addresses critical vibration-induced loosening challenges in heavy machinery, automotive assemblies, and industrial equipment. The black-oxide steel construction provides essential corrosion protection while maintaining the mechanical properties required for high-strength applications. The integrated 1 1/16" flange eliminates the need for separate washers, reducing assembly time while providing superior bearing surface distribution. The 1/2"-20 UNF fine thread configuration offers increased adjustment precision and better resistance to vibrational loosening compared to coarse thread alternatives, making it ideal for equipment requiring maximum vibration resistance and long-term reliability in demanding environments.

Specification Summary & Compliance

Manufactured to precise Class 2B thread fit tolerances with UNF fine thread specifications (1/2"-20). Features standard external hex drive (3/4" width) and right-hand thread direction. The nut meets Grade G strength classification requirements and complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, ensuring suitability for industrial applications worldwide. The flange measures 1 1/16" in diameter with 0.08" thickness for optimal load distribution characteristics.