MIL-DTL-10392F
3.18 Flexing life requirements. When tested as specified in 4.5.2, the finished cords, except WD-
27A/U, shall be capable of being flexed without loss of continuity of any of the conductors for not less
than 30,000 cycles. Cord WD-27A/U shall be capable of being flexed without loss of continuity of any of
the conductors for not less than 15,000 cycles.
3.19 Operating range. The cords shall be flexible and resilient throughout the temperature range of
-40º C to +75º C.
3.19.1 Cold bend. Neither the jacket not the insulation shall show evidence of cracks, flaws or other
damage when tested at -45º C in accordance with 4.5.10.
3.20 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or
environmentally preferable materials should be used to the maximum extent possible, provided that the
material meets or exceeds the operational and maintenance requirements, and promotes economically
advantageous life-cycle costs.
3.21 Workmanship. Cords shall be constructed and finished in a thoroughly workmanlike manner in
accordance with accepted high grade production techniques. The cords shall be a uniform and
consistent product and shall be free from any defects which will adversely affect the serviceability of the
product, such as lumps, kinks, splints, abrasions, scrapes, corroded surfaces, skin impurities and faulty
extruded surfaces.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as
follows:
a. Qualification inspection (see 4.3).
b. Conformance inspection (see 4.4).
4.2. Test equipment and inspection facilities. Test and measuring equipment and inspection facilities
of sufficient accuracy, quality, and quantity to permit performance of the required inspection shall be
established and maintained by the contractor. The establishment and maintenance of a calibration
system to control the accuracy of the measuring and test equipment (i.e., non-Government standard
[NGS] or federal or military standard) shall be in accordance with NCSL-Z540.3 or equivalent.
4.3 Qualification inspection. Qualification inspection shall consist of material inspection and tests
having certification supported by verifying documentation that the materials and tests listed in table IV,
used in fabricating the designated cord type (see 3.2), are in accordance with the applicable referenced
specification or requirements prior to such fabrication.
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