MIL-DTL-55668D
TABLE V. Materials inspection.
Material
Requirement paragraph
Applicable specification
Tinsel wire
N/A
Insulation
ASTM D1248 and ASTM D4101
Fillers, Center core
-------
Cellulose triacetate
MIL-C-572, type CTA
Polyester
MIL-C-572, type PSTR
Polypropylene
-------
Staycords
MIL-C-572, type PAA
Polyester tape
MIL-I-631, type G
Jacket material
Table II
4.5 First article inspection. First article inspection shall be performed by the supplier after award of
contract and prior to production, at a location acceptable to the government (see 6.4). First article
inspection shall be performed on sample units which have been produced with equipment and
procedures normally used in production (see 3.1).
4.5.1 Sample size and test routine. Twenty-five sample units shall be subjected to the tests specified in
table VI. These sample units shall be of sufficient length to perform the tests specified.
TABLE VI. First article inspection tests.
Requirement
Property
Stranded wire construction, coating; tensile strength and elongation of stranded
conductor.
Stranded wire conductor resistance.
Tinsel wire construction, properties.
Insulation properties.
Insulation wall thickness.
Dimensions of insulated conductors.
Insulation colors.
Fibers and yarns.
Fillers.
Staycord.
Shield wire; construction, coverage, outside diameter.
Shield resistance.
Jacket wall thickness and outside diameter.
Jacket material properties.
Cord construction.
Cord properties: Retractility, breaking load, cord extension (7:1) force, retraction after
static vertical loading, low temperature extension and retraction, cold bend, retraction at
85 C, voltage withstand, insulation resistance, continuity, stretch cycling, bending flex,
humidity cycling and simulated storage.
4.5.2 Failures. No failures of the tests specified in table VI are permitted.
4.6 Conformance inspection.
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