MIL-DTL-5898H
4.6.10 Insulation shrinkage. The outer jacket shall be stripped approximately 3 inches and each
individual wire stripped approximately .250 inch (6.4mm) The bare wires shall be twisted by hand and
remain at its minimum diameter in five twists or less and shall not spread or fray at the end. The wires
shall be tinned and soldered in accordance with FED-STD-228, method 8231.
4.6.11 Ozone resistance. The cord shall be wrapped around a mandrel that is four times the outside
diameter of the specimen in such a manner that the cord is kept taut throughout the test. The mandrels
and specimens shall be kept at room temperature for 2 days, after which these items shall be placed in
an atmosphere containing 25±5 parts of ozone per one-hundred million parts of air. A temperature of
50°C shall be maintained and the test continued for a period of 7 days. After the test has been
completed, the jacket of the specimen shall be inspected for cracking through a magnifying glass of at
least three diameters magnification.
4.6.12 Cold bend. The cord shall be attached to the proper size mandrel as specified in table X and
suspended vertically with the lower ends weighted sufficiently to keep the cord taut and to permit bending
without handling. The cord and mandrel shall be placed in a chamber at -55+0, -5 °C for a minimum of
20 hours. While maintaining the cord at -55 °C, the cord shall be bent for 5 close turns around the
mandrel at the rate of approximately 15 turns per minute. The jacket shall then be examined for cracks
using a magnifying glass of at least 3 diameters magnification. After examination of the jacket, the jacket
shall be removed and the conductor insulation examined for cracks using the same magnifying glass.
TABLE X. Mandrel size for cold bend test.
Cord type
Maximum mandrel size
WF-5/U
WD-34/U
1 times cord OD
WM-53/U
WF-14/U
3 times cord OD
WM-85/U
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor
personnel, these personnel need to contact the responsible packaging activity to ascertain packaging
requirements. Packaging requirements are maintained by the Inventory Control Point's packaging
activities within the Military Service or Defense Agency, or within the military service's system commands.
Packaging data retrieval is available from the managing Military Department's or Defense Agency's
automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.
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