MIL-DTL-8777F
shown that the corrective action was successful. In the event of failure after re-inspection, information
concerning the failure should be provided to the cognizant inspection activity.
4.5 Process control inspections. These inspections are of such a nature that either they cannot be
performed on the finished wire or do not lend themselves to statistical plans because the total length of
wire is exposed to the inspection. Therefore, these inspections must be performed during the most
appropriate stage of the manufacturing operations. The process control inspections shall consist of the
inspections specified in table V.
TABLE V. Process control inspections.
Inspection or test
Requirement
Method
Coating continuity
Conductor material
4.6.2
Splices
Primary insulation flaws
Finished insulation flaws
4.5.1 Sampling.
4.5.1.1 Conductor material. From each week's production of individual strands or from every 1,000
pounds of finished strand, whichever is less, three 10-foot lengths of strand shall be selected in such a
manner as to be representative of the material to be used in the finished insulated wire.
4.5.1.2 Splices. The manufacturer's method of splicing individual strands and members shall be
observed at random intervals not exceeding 1 week.
4.5.1.3 Coating. The sample shall consist of not less than 3.5 feet of silver-coated strand, before
stranding, which is representative of the strand unused in the manufacture of each inspection lot of
finished wire (see 4.5.1.1).
4.5.2 Rejection and retest. When the sample selected from a production run fails to meet the specified
test, no items still on hand or later produced shall be accepted until the extent and cause of the failure
has been determined. After investigation, the contractor shall advise the procuring activity of the action
taken and, after corrections have been made, shall repeat all the process control tests. Rejection after
corrective action will require that the contractor advise the procuring activity of the details surrounding the
retest and cause for rejection.
4.6 Methods of inspection and test.
4.6.1 Visual and mechanical examination. All samples of wire shall be carefully examined for
conformance to those requirements of this specification, which are not covered by tests.
4.6.2 Conductor.
4.6.2.1 Continuity of coating. The continuity of coating test for the individual silver-coated strands of
the conductor shall be performed as specified in ASTM B298.
4.6.2.2 Thickness of coating. The thickness of coating test for the individual silver-coated strands of
the conductor shall be performed as specified in ASTM B298.
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