MIL-DTL-83425A
3.5.3 Wearability. The earcup shall not have any design or material property that might cause
discomfort or affect wearability (see 4.5.4).
3.6 Part numbering of interchangeable parts. All parts having the same manufacturer's Part or
Identifying Number (PIN) shall be functionally and dimensionally interchangeable. The item identification
and PIN requirements conforming to MIL-DTL-31000 shall govern the manufacturer's PIN and changes
thereto.
3.7 Identification of product. The earcup shall be marked for identification conforming to
3.8 Workmanship. The earcup shall be clean and free from any defect that might affect function ability.
The shell shall be smooth and free of chips and cracks. The cushion shall be smooth and free of sharp
edges in areas adjacent to user's ear.
4. VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein are classified as follows:
a. First article inspection (see 4.3).
b. Conformance inspection (see 4.4).
4.2 Test conditions. Unless otherwise specified herein, the examinations and the tests specified herein
shall be performed under the following standard test conditions:
a. Temperature between +15 degrees and +35 degrees centigrade
b. Normal ground altitude.
c. Prevailing room ambient humidity.
d. No vibration.
4.3 First article inspection. The first article test shall consist of all of the examinations and tests
described (see 4.5). Six (6) of the first article samples specified in 4.3.1 shall be subjected to all of the
examinations and tests described. The first article tests shall be performed in the following order:
a. Examination of product
b. Mechanical stability
c. Sound attenuation.
4.3.1 Samples. The first article samples shall consist of 16 (sixteen) earcups that are representative of
the earcups to be manufactured during production. The first article samples shall have been
manufactured in the same facilities and with the same equipment that are to be used for the manufacture
of the production items. The first article samples shall be marked with the manufacturer's PIN and any
other information specified by the procuring activity. The 10 (ten) untested first article samples shall be
submitted, as specified in the contract or purchase order (see 6.2), for any verification deemed necessary
of any tests and of adaptability of the earcup to the HGU-26/P helmet. The 6 (six) tested first article
samples shall be made available to the procuring activity.
5
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business