MIL-DTL-28748D
TABLE XII. Lot and sample size.
Lot size
Sample size
5
1 to 50
7
51 to 90
11
91 to 150
13
151 to 280
16
281 to 500
19
501 to 1200
23
1201 to 3200
29
3201 to 10000
35
10001 to
4.5.1.2.2 Rejected lots. If an inspection lot is rejected, the manufacturer may rework it to correct the defects, or screen out
the defective units, and resubmit for reinspection. Resubmitted lots shall be inspected using the sample size of the next
higher lot size specified in table XII and shall not thereafter be tendered for acceptance unless the former rejection or
requirement of correction is disclosed. Such lots shall be clearly identified as reinspected lots.
4.5.1.2.3 Disposition of sample units. Sample units which have passed all the group A inspections may be delivered on the
contract if the lot is accepted and the sample units are still within the specification tolerances.
4.5.1.3 Group B inspection. Group B inspection shall be performed every 6 months on sample units, which have passed
group A inspections. Group B inspections shall consist of the examinations and tests specified in table XIII, in the order
shown, and the sample shall be selected from inspection lots that have passed group A inspection. Connector series may be
combined for lot purposes during group B inspection and shall be in proportion to the number of connectors produced in each
series.
TABLE XIII. Group B inspection.
Inspection
Requirement
Test
paragraph
paragraph
4.7.2
3.3, 3.4, 3.5, 3.6,
Examination of product
and 3.7
4.7.3
3.5.1
Permeability
4.7.4
3.5.2
Insulation resistance
4.7.6
3.5.4
Contact retention
4.7.12
3.5.10
Insertion and withdrawal force
(connector assembly)
4.5.1.3.1 Sampling plan. Four sample pairs containing the largest number of contact positions with a full complement of
contacts (not including the variation in terminal types) available at time of inspection should be selected at random from items
produced every 6 months. Where crimp type contacts are specified, that type shall be used in group B samples.
4.5.1.3.2 Failures. If one or more sample units fail to pass group B inspection, the sample shall be considered to have
failed.
4.5.1.3.3 Rejected lots. If an inspection lot is rejected, the contractor may rework it to correct the defects, or screen out the
defective units, and resubmit for reinspection. Resubmitted lots shall be inspected using tightened inspection. Such lots shall
be separate from new lots, and shall be clearly identified as reinspected lots.
4.5.1.3.4 Disposition of sample units. Sample units, which have passed group B inspection, may be delivered on a
contract or purchase order if the lot is accepted.
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