MIL-DTL-3650B
4.3.1.5.1.2.1 Disposition of sample units. Sample units, which have been subjected to group C
inspection, subgroup 2, shall not be delivered on the contract or order.
4.3.1.5.2 Noncompliance. If a sample fails to pass group C inspection, the supplier shall take
corrective action on the materials or process, or both, as warranted, and on all units of product which can
be corrected and which were manufactured under essentially the same conditions, with essentially the
same materials, processes, etc, and which are considered subject to the same failure. Acceptance of the
product shall be discontinued until corrective action, acceptable to the Government, has been taken.
After the corrective action has been taken, group C inspection shall be repeated on additional sample
units (all inspection, or the inspection which the original sample failed, at the option of the Government).
Groups A and B inspection may be re-instituted, however, final acceptance shall be withheld until the
group C re-inspection has shown that the corrective action was successful. In the event of failure after re-
inspection, information concerning the failure and the corrective action taken shall be furnished to the
contracting officer.
4.3.2 Test equipment and inspection facilities. Test equipment and inspections facilities shall be of
sufficient accuracy, reliability, and quantity to permit performance of the required inspection to the
satisfaction of the Government.
4.4 Methods of examination and test.
4.4.1 Visual and mechanical examination. Connectors shall be examined to verify that the materials,
design, construction, physical dimensions, marking and workmanship are in accordance with the
applicable requirements (see 3.1, 3.3.3, 3.6, and 3.7).
4.4.1.1 Gage tests for contacts (see 3.3.4).
4.4.1.1.1 Center contacts (female) (see 3.3.4.1).
a. Contacts mating with a .188 inch (4.77 mm) -diameter pin shall be formed in at their longitudinal
centers and all contact members shall make contact with a rod .183 inch (4.65 mm) in diameter,
but shall not make contact with a rod .178 inch (4.52 mm) in diameter (see 3.3.4.1).
b. Contacts mating with a .250 inch (6.35 mm) diameter pin shall be formed in at their longitudinal
centers and all contact members shall make contact with a rod .254 inch (5.33 mm) in diameter,
but shall not make contact with a rod .240 inch (6.10 mm) in diameter (see 3.3.4.1).
4.4.1.1.2 Outer contacts (see 3.3.4.2).
a. All fingers of the outer contacts whose nominal outside diameter is .789 inch (20.04 mm) shall
make contact within .031 inch (7.87 mm) of their tip ends with a gage ring having an inside
diameter of .793 inch (20.14 mm), but shall not make contact with a ring having an inside diameter
of .803 inch (20.40 mm) (see 3.3.4.2).
b. All fingers of the outer contacts whose nominal outside diameter is 1.055 inches (26.80 mm) shall
make contact within .031 inch (7.87 mm) of their tip ends with a gage ring having an inside
diameter of 1.063 inches (27.00 mm), but shall not make contact with a ring having an inside
diameter of 1.071 inches (27.20 mm) (see 3.3.4.2).
4.4.2 Coupling nuts. A pull of 100 pounds shall be applied to the coupling nut. It shall be applied in the
direction away from the connector body and along the longitudinal axis (see 3.3.5).
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