S-90759A550 1/2"-20 Flange Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel coating, extending service life in harsh industrial environments
• Precise thread engagement with Class 3B fit and fine UNF threads, ensuring reliable, vibration-resistant connections
• High torque application capability via the 12-point external drive, allowing for secure tightening with standard tools
• Integrated flange design with 53/64" diameter, distributing load evenly and eliminating the need for separate washers
• Durable construction from robust steel material, providing consistent performance under heavy-duty mechanical stress
• Wide compatibility with right-hand UNF threaded components, ideal for precision assemblies in automotive and machinery
• Streamlined installation due to standard hex nut profile and fine thread spacing, reducing assembly time and errors

Professional Applications & Engineering Value

This black-oxide steel flange nut is engineered to address critical challenges in industrial fastening, such as vibration loosening and corrosion-induced failure. The Class 3B thread fit and fine UNF threads deliver exceptional accuracy, minimizing backlash in high-precision equipment like automotive transmissions, hydraulic systems, and heavy machinery. The 12-point external drive facilitates high-torque installation without slippage, while the integrated flange enhances stability by increasing the bearing surface area. This design prevents surface damage and maintains clamping force under dynamic loads, making it a reliable choice for applications demanding durable, corrosion-resistant fastening solutions that comply with rigorous engineering standards.

Specification Summary & Compliance

This flange nut features a 1/2"-20 UNF fine thread with Class 3B fit for tight tolerances, a flange diameter of 53/64", and a thickness of 0.13". Manufactured from black-oxide coated steel with a standard hex profile and right-hand thread direction, it adheres to UNF thread standards and common industrial specifications. The product is designed to meet general industry requirements for performance and is compliant with RoHS and REACH environmental directives, ensuring safe use in various sectors without hazardous substances.