Hydraulic hoses are usually designated by what standard unit?

Hydraulic hoses are typically designated by dash numbers, which are standardized measurements that represent the inside diameter of the hose in sixteenth-inch increments. This system allows for precise identification and specification of hoses within hydraulic systems, ensuring compatibility with fittings and other components. For example, a dash number of -6 indicates a hose with an inside diameter of 6/16 inches, or 3/8 inches.

The use of dash numbers is critical for maintaining system integrity and avoiding pressure loss or failure due to incorrect hose sizing. This standardization enables easy reference and communication between manufacturers, technicians, and engineers in the field, facilitating repairs and maintenance.

The other choices—such as inches, feet, and yards—are not typically used to designate hydraulic hoses in this context, as they do not provide the level of precision necessary for hydraulic applications.