This specification covers the general requirements for hose, rubber, lightweight, medium pressure, with operating limits of -65 to 250 °F and 200 to 1000 psi suitable for aircraft fuel and oil systems within the limits specified herein.Intended Use: The hose covered by this specification is military unique due to its ability to operate satisfactorily at pressures up to 1000 psi in a temperature range of -65 °F to 250 °F (-54°C to 121°C) and meet the interoperability and compatibility requirements while encountering rapid ambient temperature fluctuations. The hose is intended for use in aircraft fuel and oil systems. This hose is not recommended for vacuum, unless an internal support coil is used, or hydraulic impulse applications.