MIL-DTL-25136B
4.4 Conformance inspection. The conformance inspection shall consist of the following:
a. Individual tests (see 4.4.1).
b. Sampling tests (see 4.4.2).
4.4.1 Individual tests. Each piece of continuous finished wire shall be tested as specified in 4.5.1
and 4.5.2.
4.4.2 Sampling tests. A 10-foot sample of wire shall be selected from each quantity of 10,000 feet
(see 4.6 and 6.2) or fraction thereof on the order and tested as specified in 4.5. If the sample fails to
meet any one of the tests under 4.5, two additional samples of sufficient length for the particular failed
test(s) shall be selected from the same source as the original sample and the failed test(s) repeated two
times.
4.4.3 Failure of tests. When sampling tests are specified on a number of items that are selected
from an order to be delivered and one or more of this number fails to meet the specified tests, acceptance
of all items still on hand and subsequently produced shall be withheld until the extent and cause of failure
is determined. For operational reasons, individual tests may be continued pending investigation of a
sampling test failure. However, final acceptance of the items on hand and subsequently produced is
contingent upon the inspector's decision regarding the overall conformance of the product to specification
requirements. When corrective action has been accomplished, all necessary tests shall be repeated. If
investigation indicates that the defects may exist in items previously accepted, full particulars concerning
the defects, including recommendations for correction, shall be furnished to the contracting officer.
4.5 Test methods.
4.5.1 Examination of product. Each coil of antenna wire shall be examined visually to determine
conformance to this specification with respect to material and workmanship.
4.5.2 Diameter. Each coil of wire shall be measured at both ends to determine compliance with the
diameter requirements of this specification. Sufficient additional spot checks along the coil length shall be
made to assure conformance to this requirement.
4.5.3 Tensile strength and elongation. Three full cross-section specimens (see 4.6) shall be marked
with a 10 inch (254.00 mm) gage length and tested for compliance with the tensile strength, both the
upper and lower limits, and elongation requirements of this specification. The testing machine shall be
sensitive to a variation of 0.4% of any recorded load and shall be calibrated when required by the
inspector. The speed of the testing machine shall be such that the load is accurately indicated at all
times. Specimens breaking outside of the gage marks shall be disregarded and additional specimens
tested.
4.5.4 Bending. The wire shall be bent flat on itself, to test its compliance with the bending
requirement of this specification.
4.5.5 Torsion. The wire shall be tested to determine compliance with the torsion requirement of this
specification as follows:
The specimen shall be gripped between jaws 6 inches (152.40 mm) apart; one jaw being held
stationary, the other jaw to be revolved continuously in one direction with a pull of 5 pounds
applied to the wire longitudinally throughout the test.
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