These precision machined flange assemblies are high-performance structural and connecting components crafted from premium stainless steel/alloy steel, integrating forging and CNC machining technologies. Engineered for industrial applications such as petrochemical, aerospace, and heavy machinery, they deliver exceptional dimensional accuracy (tolerance within ±0.01mm), superior mechanical strength, and excellent corrosion resistance. Designed to form leak-tight, high-pressure connections in piping systems and equipment interfaces, these flanges meet international standards like ASME/ANSI and DIN, ensuring compatibility and reliability in critical operating environments.

1. Cold Heading Process: A cold heading machine is used to forge steel round bars at room temperature to form the main structures such as the nut head and shank in one operation. This process improves the density and strength of the metal and is suitable for mass production. 2. Thread Processing: Internal threads are made through thread rolling/tapping processes. Thread rolling produces threads with high precision and good strength, which is the mainstream thread processing method for wheel nuts. 3. Surface Treatment: First, heat treatment (quenching and tempering) is carried out to improve hardness, followed by electroplating (zinc plating/chrome plating) to achieve rust prevention and a bright appearance. In some cases, carburizing/nitriding treatment is also applied to enhance wear resistance. 4. Auxiliary Processing: Turning/milling is performed on the anti-theft sleeve (the left part) to create a special-shaped inner hole that matches the anti-theft nut, ensuring anti-theft compatibility.