MIL-DTL-83505B
4.5.1.2 Group A inspection. Group A inspection shall consist of the inspections specified in table III, on the same set of sample
units in the order shown.
TABLE III. Group A inspection.
Method
Inspection
Requirement
paragraph
paragraph
3.1, 3.3, 3.4,
4.6.2
Visual and mechanical inspection
3.6, and 3.7
3.5.1
4.6.3
Insertion force
3.5.2
4.6.4
Withdrawal force
4.5.1.2.1 Sampling plan (group A). Table III tests shall be performed on a production lot basis. Samples shall be selected in
accordance with table IV. If one or more defects are found, the lot shall be screened for that particular defect and defects removed.
A new sample of parts shall be selected in accordance with table IV and all group A tests again performed. If one or more defects
are found in the second sample, the lot shall be rejected and shall not be supplied to this specification.
TABLE IV. Lot and sample size.
Lot size
Sample
size
1 to 50
5
51 to 90
7
91 to 150
11
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 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.
4.5.2 Periodic inspection. Periodic inspection shall consist of group B. Except where the results of these inspections show
noncompliance with the applicable requirements (see 4.5.2.1.2), delivery of products which have passed group A inspection shall not
be delayed pending the results of these periodic inspections.
4.5.2.1 Group B inspection. Group B inspection shall consist of the tests specified in table II, in the order shown. Group B
inspection shall be made on sample units selected from inspection lots, which have passed the group A inspection.
4.5.2.1.1 Sampling plan.
4.5.2.1.2 Single submission. Eight (8 ) sample sockets (type I through IV) or 4 (type VI) sockets from those covered by a single
specification sheet shall be selected at random from items produced every 36 months.
4.5.2.1.3 Inspection routine. The sample shall be subjected to the inspections specified in table I, in the order shown. All sample
units shall be subjected to the inspections of group I. The samples shall be divided as follows and subjected to the inspections for
their particular group.
a. 2 groups of 2 units for type I and VI sockets.
b. 4 groups of 2 units for type II through V sockets.
4.5.2.1.4 Noncompliance. If a sample fails to pass group B inspection, the contractor shall take corrective action on the materials
or processes, or both, as warranted, and on all units of product which can be corrected and which were manufactured under
essentially the same conditions, with essentially the same materials, processes, etc., and which are considered subject to the same
failure. Acceptance of the product shall be discontinued until corrective action, acceptable to the Government, has been taken. After
the corrective action has been taken, group B inspection shall be repeated on additional sample units (all inspection, or the
inspection, which the original sample failed, at the option of the Government). Group A inspections may be reinstituted; however,
final acceptance shall be withheld until the group B reinspection has shown that the corrective action was successful. In the event of
failure after reinspection, information concerning the failure and corrective action shall be made available to the cognizant inspection
activity and to the qualifying activity.
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