MIL-DTL-55668 Cord, Electrical; Audio, Subminiature \(Retractile And Straight\)This specification covers subminiature audio helical retractile cords and straight cords with either stranded wire or tinsel wire conductors, for accessories associated in for the use with microphone, telephone, switchboard, and associated communication equipment. These cords are intended for operations at audio frequencies and temperatures from -55 Degrees C to +85 Degrees C with a high degree of flexibility. Each retractile cord is designed for extension in normal service up to 6 times its nominal retracted helical length.

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MIL-DTL-55668D

TABLE VIII. Group A inspection.1/

Requirement

Test method

Examination or test

paragraph

Subgroup I

Visual and mechanical

3.2 through 3.7

Material and construction

and 3.9

Workmanship

Subgroup II

Electrical

Table III

Voltage withstand

Table III

Insulation resistance

Table III

Continuity

1/ All electrical defects are considered major.

4.6.2.2 Rejected lots. If an inspection lot is rejected, the supplier may withdraw the lot from further

inspection. The supplier may also rework a rejected lot to correct the defects or screen out the defective

units and reinspect the lot in accordance with 4.6. Rejected lots shall be kept separate from new lots and

shall not lose their identity.

4.6.3 Group B inspection. This inspection, including sampling, as specified in table IX. Group B

inspection shall be performed on inspection lots that have passed group A inspection and on specimens

selected from units of product that have been subjected to and met the group A inspection. Sample size

selection shall be in accordance with table X.

4.6.3.1 Group B acceptance. Each sample selected in accordance with 4.6.3 shall be examined to

determine conformance with the requirements in table IX. If one or more defects are found in the

inspection sample, then the production lot shall be inspected for that particular defect and defects

removed. A second inspection sample shall be selected from the production lot and all inspections

performed again. If one or more defective items are found in the second inspection sample, the

production lot shall be rejected and shall not be supplied to this specification. Group B inspection shall be

performed in any order which is satisfactory to the government.

4.6.3.2 Disposition of samples. Samples subjected to group B tests shall not be delivered on contract or

order.