MIL-DTL-12995E
4.4.3 Rejected lot. Failure of any sample to pass any inspection shall constitute a failure of the lot. If
an inspection lot is rejected, the contractor may rework the lot to correct the defects or screen out the
defective units, and resubmit the lot for re-inspection. Such lots shall be separated from new lots and
shall be identified as re-inspected lots (see 4.4.4).
4.4.4 Noncompliance. If a sample fails to pass any inspection, the contractor shall notify the
cognizant inspection activity of such failure and take corrective action on the materials or processes or
both, as warranted on all units of the product. Acceptance and shipment of the product shall be
discontinued until corrective action has been taken. After the corrective action has been taken, the
conformance inspection shall be repeated on replacement articles. (This includes all tests and
examinations, or only the test that the original sample failed, at the option of the cognizant inspection
activity.) Final acceptance and shipment shall be withheld until inspection has shown that the corrective
action was successful. In the event of failure after re-inspection, information concerning the failure shall
be provided to the cognizant inspection activity.
4.4.5 Group A inspection. Group A inspection shall include the applicable inspections specified in
table I.
4.4.6 Group B inspection. Group B inspection shall include the applicable inspections specified in
table I. Unless otherwise specified (see 6.2), group B inspection shall be performed on sample units that
have been subjected to and have passed the group A inspection.
4.5 Inspections.
4.5.1 Visual and dimensional inspection. Inspect the strands and the finished wire to verify that the
material and all workmanship comply with this specification. Certification of compliance of materials and
splices (see 4.3) may be accepted at the option of the Government.
4.5.1.1 Strand diameter inspection. Strands shall be measured with a micrometer at three places,
one near each end and one in the middle of the wire. The average of the measurements obtained on any
piece shall be used for the finished unit.
4.5.1.2 Construction inspection. Construction of the finished wire shall be verified by physical
examination.
4.5.2 Tensile strength and elongation tests. Tensile strength and elongation of the finished wire shall
be performed on a tensile strength machine, preferably of the pendulum type. The tensile strength test
shall be accomplished on finished wire. The free length between grips of the test specimen shall be 60±1
inches. The speed shall be not more than 3 inches per minute for the test machine. Care shall be taken
1/
to ensure that strands in the stranded wire are evenly gripped during testing. The breaking strength of
strands shall be computed by using the nominal diameters and tensile strength specified (see 3.3.1.1,
3.3.2, and 3.4.1). Elongation tests shall be performed on strands and shall meet the requirements of
4.5.3 Continuity test. Each finished length of wire shall be tested to verify continuity using a potential
of not more than 10 volts dc.
1/ Successful testing of stranded wire for tensile properties requires an adequate means of gripping
the ends of the test specimen. Various means are available, such as a long tube or socket into
which the wire may be soldered or in which, after insertion, the wires may be swaged or pressed
without serious distortion. Ordinary jaws or clamping devices are usually not suitable.
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