MIL-DTL-12883F
4.6.2.1 Group B inspection. Group B inspection shall consist of the tests specified in table VI. Group B
inspection shall be made on sample units selected from inspection lots, which have passed the group A
inspection.
TABLE VI. Group B inspection.
Inspection
Requirement
Method
paragraph
paragraph
Subgroup 1
Vibration
3.5.7
4.7.8
Mechanical shock (when specified)
3.5.8
4.7.9
Gauge retention
3.5.4
4.7.5
Contact resistance
3.5.5
4.7.6
Humidity
3.5.9
4.7.10
Insulation resistance
3.5.2
4.7.3
Dielectric withstanding voltage
3.5.3
4.7.4
Salt spray (corrosion)
3.5.15
4.7.16
Subgroup 2 1/ 2/
Durability
3.5.10
4.7.11
Insertion and withdrawal force
3.5.1
4.7.2
Gauge retention
3.5.4
4.7.5
Contact resistance
3.5.5
4.7.6
Contact tab flexure (when specified)
3.5.12
4.7.13
Subgroup 3
Static load (when specified)
3.5.11
4.7.12
Thermal shock
3.5.13
4.7.14
Porosity (ceramic sockets only)
3.5.14
4.7.15
1/ Six specimens for each test.
2/ Not required for sockets using qualified contacts.
4.6.2.1.1 Sampling plan. Eighteen sockets of each specification sheet shall be selected every 36
months. No failures are permitted.
4.6.2.1.2 Disposition of sample units. Sample units, which have been subjected to group B inspection,
shall not be delivered on the contract or order.
4.6.2.1.3 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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