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 MS33656, 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.

Product Classification:

Hydraulic self-sealing couplings shall be of the following classes

a. Class 1000: 1000 lbf/in² (gage)

b. Class 3000: 3000 lbf/in² (gage)

c. Class 4000: 4000 lbf/in² (gage)

d. Class 5000: 5000 lbf/in² (gage)