The exact thickness of cold-dip galvanized square tubes varies depending on product standards and manufacturers. Generally, the thickness of cold-dip galvanized square tubes can range from a few millimeters to tens of millimeters. Common thicknesses include 0.5mm, 0.75mm, 1mm, 1.2mm, 1.5mm, etc. When purchasing, it is necessary to choose the appropriate thickness based on specific needs and applications. However, for situations where galvanized square tubes are required, it is recommended to consult professional manufacturers or relevant institutions for specific values.