MIL-PRF-81975C
(Copies of these documents are available online at https://www.sae.org or from the
Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 15090.)
2.4 Order of precedence. In the event of a conflict between the text of this document and
the references cited herein, (except for related specification sheets), the text of this document
takes precedence. Nothing in this document, however, supersedes applicable laws and
regulations unless a specific exemption has been obtained.
3.
REQUIREMENTS
3.1 Specification sheets. The individual item requirements shall be as specified herein and
in accordance with the applicable specification sheet. In the event of any conflict between the
requirements of this specification and the specification sheet, the latter shall govern.
3.2 Qualification. The couplings furnished under this specification shall be products that
are authorized by the qualifying activity for listing on the applicable qualified products list
before contract award (see 4.4 and 6.3).
3.3 Components. The coupling shall consist of an assembled unit conforming to the
envelope shown on figure 1 for MA-3 and MA-4 couplings and conforming to MS24355 for
MA-2 couplings. Attachment parts (MS24358, MS2436l, MS24362, SAE-AS29513, and a spiral
retaining ring conforming to MIL-DTL-27426) are not considered a portion of the coupling.
Installation features of these attachments are shown on MS24354.
3.4 Materials.
3.4.1 Fluid resistance. All materials used in the construction of the coupling shall be
resistant to the following fluids:
a. Jet fuels conforming to MIL-DTL-5624, MIL-DTL-83133 and GOST 10227 (TS-1).
b. Jet-A, Jet-Al, Jet-B, and other commercially available turbine fuels conforming to
ASTM-Dl655.
c. NATO fuels F-34, F-35, F-37, F-40, and F-44.
d. Test fluids conforming to MIL-DTL-5624, ASTM-D471, Types I and III, and MIL-PRF-
7024 Type II.
e. Deicing fluid conforming to SAE-AMS1424 and SAE-AMS1428.
3.4.2 Corrosion-resistant materials. All materials shall be corrosion-resistant or treated to
resist corrosion from fuels, salt spray, and atmospheric conditions to be encountered in storage or
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