The fittings covered by this specification are intended for military unique hose assemblies used in military aircraft lubricating and fuel systems requiring interoperability and compatibility with associated components and equipment. These systems are required to withstand temperatures between −65 °F to +250 °F and operate at pressures up to 1000 psi. The interoperability and compatibility has been assured through strict adherence to the military detail specification requirements. Manufacturer of these items and users place great reliance on the detailed technical requirements to ensure the products meet the interoperability and compatibility requirements while encountering rapid ambient temperature fluctuations. This fitting is not recommended for vacuum or hydraulic impulse applications.