Hydraulic hose adapters are fittings that securely connect hydraulic hoses to pipe, tubing, or hoses that have different thread types or sizes. They have two or more threaded ends and attach to compatible parts with a wrench, solvent welding, or soldering to create a seal. These adapters are used in hydraulic hose assemblies to convey fluids in petroleum- and water-based hydraulic systems commonly found on industrial, mining, and manufacturing equipment.