MIL-PRF-55339C
3.25 Coupling mechanism retention force. When tested as specified in 4.5.22, the coupling
mechanism shall not be dislodged from the adapter and shall be capable of meeting the requirements
of 3.6.1 immediately after the test.
3.26 Marking. Adapters and associated fittings shall be permanently and legibly marked in
manufacturer's federal supply code, and final assembly date code. The marking location is optional;
when practicable, a location should be picked that will allow the marking to be visible after installation.
Marking is required on all parts manufactured to this specification unless specifically excepted (see
3.1).
3.27 Workmanship. Adapters and associated fittings shall be processed in such a manner as to be
uniform in quality and shall be free from sharp edges, burrs and other defects that will affect life,
serviceability or appearance.
3.28 Safety wire hole pullout. When applicable (see 3.1), adapters are to be tested as specified in
4.5.23. There shall be no evidence of hole tear out.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as
follows:
a. Qualification inspection (see 4.3).
b. Conformance inspection (see 4.4).
c. Periodic inspection (see 4.4.2).
4.2 Inspection conditions. Unless otherwise specified, all inspections shall be performed in
accordance with the test conditions specified in the "GENERAL REQUIREMENTS" of MIL-STD-202.
For each test of threaded coupling connectors, where the test is performed on mated pairs, the pair
shall be torqued to the specified value (see 3.1).
4.3 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable
to the Government (see 6.3) on sample units produced with equipment and procedures normally used
in production.
4.3.1 Sample size. Ten class 1 adapters of the same PIN, or six class 2 adapters of the same PIN,
shall be subjected to the qualification inspection.
4.3.2 Group qualification. For group qualification of all series of adapters covered by this
specification (see 3.1). The Government reserves the right to authorize performance of any or all
qualification inspections of additional types in the group that are considered necessary for
qualification within each group.
4.3.3 Inspection routine. The sample shall be subjected to the inspections specified in table II. All
sample units shall be subjected to the inspection of group I. The sample units shall then be divided
equally into two groups of 5 units (class 1) or three units each (class 2) and subjected to the
inspection for their particular group and in the sequence given for that group.
4.3.4 Failures. One or more failures shall be cause for refusal to grant qualification approval.
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