This document establishes the requirements for aircraft, hydraulic couplings, self-sealing one side only, for use in Type II hydraulic systems (-65 to +275 °F temperature range) as defined by MIL-H-5440. the purpose being to connect a hose or tube to a standard MS33655, MS33514 or MIL-F-85421, or MIL-F-85720 fitting and to provide the self-sealing feature on the hose or tube side of the connection.
Hydraulic self-sealing coupling shall be of the following classes.
a. Class 1000: 1000 Ibf/in2 (gage)
b. Class 3000: 3000 Ibf/in2 (gage)
c. Class 4000: 4000 Ibf/in2 (gage)
d. Class 5000: 5000 Ibf/in2 (gage)