The hose assembly covered by this specification is military unique to meet the requirements specified herein and in the applicable specification sheets. The hose qualified in accordance with MIL-DTL-27267 for field attachable fitting assemblies should be mated with either reusable fittings qualified in accordance with MIL-DTL-27272 or with permanent fittings to meet the requirements specified herein and in the applicable specification sheet. This hose assembly is a hydraulic or pneumatic conductor for a fluid at the operating pressure, specified in table III, even under extreme temperature conditions ranging from −65°F to 450°F (275°F for class 2). The hose assembly is intended for use in high-temperature fuel, lubricating oil, water-alcohol, chemical-fluid, hydraulic and pneumatic systems that allow some gaseous effusion through the hose wall. However, hose assembly used in hydraulic and pneumatic systems should not exceed the temperature limit of 400°F. Furthermore, it is recommended that this hose assembly should not be used in pneumatic storage system applications and in any applications that exceed the operating temperature range and pressure specified herein. Hose assembly sizes 20Z and 24Z should not be used in systems where the peak pressures are greater than 1000 psi. Hose assembly size −3/−4 is not intended for use in aircraft hydraulic systems.