MIL-DTL-5521C
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
a. First article inspection (see 4.3).
b. Conformance inspection (see 4.5).
4.2 Inspection conditions. Unless otherwise specified (see 6.2) all inspections shall be performed in
accordance with the applicable test conditions specified in MIL-STD-311.
4.3 First article inspection. First article inspection shall be performed at a laboratory acceptable to the
procuring activity (see 6.3), on sample items produced with equipment and procedures normally used in
production.
4.3.1 Sampling instructions. Samples for first article tests shall consist of the following:
a.
One special butt bend.
b.
One special back.
c.
Sixteen MS35803-214 washers.
d.
Eight MS35803-218 washers.
e.
Nine MS35803-325 washers.
(Note: The location and direction of the backbone line shall be clearly marked on the special butt bend
and special back sample when submitted for qualification tests.)
4.3.2 Test report. Contractor shall furnish test reports in accordance with MIL-HDBK-831, the
requirements below, and any other requirement specified by the procuring activity.
a. Manufacturer's identification number (or part number) of the leather.
b. General method of stock preparation and size of hides from which the qualification samples were
produced.
c. Detailed report of manufacturer's proposed method of controlling the quality of the finished product
for which approval is requested in accordance with requirements specified herein.
d. Except for performance tests, all tests specified herein shall be accounted for in report form.
e. Name of tannery. (If leather is obtained from more than one tannery, the names and samples of
each must be submitted.)
4.4 Tests. First article tests shall consist of all the tests specified in 4.6.
4.5 Conformance inspection. Conformance inspection shall consist of the following tests:
a. Individual test.
b. Quality control test.
4.5.1 Individual test. Each article submitted for acceptance under contract shall be submitted to the
following tests, as described under 4.6:
a. Examination of reports.
b. Firmness
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