What color indicates an AN steel flared-tube fitting?

AN steel flared-tube fittings are designated by a color code for easy identification in aircraft maintenance and repair practices. The specific color that indicates AN steel flared-tube fittings is black. This coding system helps maintenance personnel quickly recognize the type and suitability of the fittings being used, which is crucial for ensuring safety and compatibility within the aircraft's hydraulic system.

Understanding these color codes is essential in the ACRM field to prevent potential mistakes that could lead to accidents or equipment failure. The other colors mentioned are used for different types of fittings or purposes, which highlights the importance of properly identifying components in aircraft maintenance.