What does the dash number in hydraulic hoses indicate?

The dash number in hydraulic hoses specifically indicates the inside diameter of the hose in 1/16 inch increments. For example, a dash number of -04 means that the inside diameter of the hose is 4/16 inches, or 1/4 inch. This standardized measurement allows users to easily identify and select hoses that fit the required specifications for their hydraulic systems. Understanding the dash number is essential for ensuring proper fluid flow and system compatibility, as the diameter directly affects the hydraulic pressure and the volume of fluid that can be efficiently transported through the hose.