MIL-DTL-5513D
3.2.5.1 Flared tube fitting end material. Joints shall have tube ends in accordance with the materials
as specified:
a. Joints of sizes -6 and smaller which incorporate tube ends in accordance with SAE-AS4395 or
SAE-AS4396 (flared) shall have at least the tube connecting ends made of CRES or steel.
b. Joints of sizes -8 and larger shall be made of aluminum alloy 7075-T73 or 7075-T351.
c. Titanium joints of sizes -4 through -20, when specified (see 1.3), which incorporate tube ends in
accordance with SAE-AS4395 or SAE-AS4396 (flared) shall have the tube connecting ends
made of titanium.
3.2.5.2 Flareless tube materials. Materials for flareless tube connecting ends in accordance with
SAE-AS33514 or SAE-AS33515 shall conform to the requirements of SAE-AS18280.
3.2.5.3 Swivel joints with tube ends. Swivel joints which incorporate tube ends in accordance with
SAE-AS33514 or SAE-AS33515 (flareless) shall have the tube connecting ends made of CRES, steel,
titanium or aluminum alloy 7075-T73 or 7075-T351.
3.2.5.4 Prohibited materials. Aluminum alloys 2014 and 2024 shall not be used for any components.
3.3 Design and construction.
3.3.1 Design. The hydraulic swivel joint shall be designed and tested in accordance with this
specification and the requirements of SAE-AS8775 (types I, II, and IV) and MIL-H-8890 (type III). In the
event of conflict, the requirements of this specification shall apply.
3.3.2 Packings and gland design. If a satisfactory installation using standard packing's or gland
design is not possible due to performance requirements, non-standard packing and gland designs may be
used subjected to approval by the procuring activity, and provided the units satisfactorily complete first
article inspection.
3.3.3 Dimensions. Hydraulic swivel joints shall be designed and constructed within the limiting
dimensions indicated on the applicable manufacturing drawings.
3.4 Performance. Hydraulic swivel joints shall satisfy the performance requirements specified in
section 4 when subjected to the applicable tests.
3.4.1 Fluid immersion. All swivel joints containing nonmetallic seals or other nonmetallic parts, other
than AN or MS static seals with standards glands, shall be fluid immersion tested in accordance with
4.7.2. There shall be no leakage, sticking, binding, or other malfunctioning of the joint after this
immersion.
3.4.2 Proof pressure. The swivel joints when subjected to the proof pressure testing in accordance
malfunctioning during this test.
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