MIL-PRF-39012E
4.6 Methods of inspection.
4.6.1 Test methods. The following identified tests and test methods assure connector integrity within
typical operating conditions and applications. Alternate commercial industry standard test methods
are allowed; however when an alternate method is used, the qualifying activity must be notified prior
to the performance of the test. The test method described herein are proven methods and shall be
the referee methods in case of dispute.
4.6.1.1 Visual and mechanical examination. Connectors and associated fittings shall be examined to
verify that the design, construction, physical dimensions, assembly instructions, marking and
3.30).
4.6.1.2 Dimensional examination. Mating dimensions shall be examined by mating the connector
with its applicable mating gauges or other suitable means acceptable to the Government.
NOTE: The associated individual specification sheets show the overall dimension of the
connector when assembled to the appropriate cable. Mating interface dimension are to be
found in MIL-STD-348. The cable end construction and other dimensions are controlled by
performance requirements of the specification (i.e., cable retention, VSWR, RF leakage, etc.,
with cable in place).
4.6.2 Force to engage/disengage.
4.6.2.1 Bayonet and threaded types (see 3.5.1). The connector shall be engaged with its mating
standard part (see 3.1). During the entire coupling/uncoupling cycle (until the connector is fully
engaged/disengaged) the forces and/or torques necessary shall not exceed those specified (see 3.1).
A threaded coupled connector is fully engaged with its mating standard part when their reference
planes (see MIL-STD-348) coincide. A bayonet coupled connector is fully engaged with its mating
standard part when the bayonet studs have passed the detent and their reference planes coincide.
No additional tightening torque shall be applied. The mating standard part is a steel jig containing the
critical interface dimensions finished to the tolerances specified (see MIL-STD-348). Its spring
members when applicable shall be heat treated beryllium copper. The surface finish or mating
surfaces shall be 16 microinches, maximum in accordance with ANSI B46.1.
4.6.2.2 "Push-on" connector types (see 3.5.2). The connector under test shall be engaged with its
standard mating part (gauge). During this engaging cycle the force necessary to fully engage the
connectors shall not exceed that specified (see 3.1). Upon completion of engagement, an opposite
force necessary for disengagement shall be applied. This force shall be within the limits specified,
and shall include any unlatching forces required.
4.6.3 Coupling proof torque (see 3.6). The connector under test shall be engaged with its mating
standard part (gauge) and the coupling nut tightened to the torque value specified (see 3.1). After
one minute the connector under test and its mating standard part shall be disengaged.
4.6.4 Mating characteristics (see 3.7). After insertion of the specified oversize pin the specified
number of times (see 3.1), the contact to be tested shall be held rigid by means of a suitable jig or
fixture. A gauge containing the test pin or test ring and a suitable force indicating dial shall be aligned
to within 0.004 TIR of any plane passing through the axis of the contact under test. Engagement or
withdrawal of the test pin or test ring shall be made smoothly and at such a rate that the dial does not
bounce or otherwise give a false reading. The test pin or test ring may be chamfered to facilitate
entry, but the specified engagement length shall not include the chamfer length and the finish shall be
as specified and in accordance with ANSI B46.1.
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