MIL-DTL-21097G
TABLE XI. Lot and sample size.
Lot size
Sample size
2 to 13
100%
14 to 150
13
151 to 280
20
281 to 500
29
501 to 1,200
34
1,201 to 3,200
42
3,200 to 10,000
50
10,001 to 35,000
60
35,001 to 150,000
74
150,001 to 500,000
90
500,001 and over
102
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 V and shall not thereafter be tendered for acceptance unless the former rejection or
requirement of correction is disclosed. Such lots shall be separate from new lots, and shall be clearly identified as
reinspected lots.
4.5.2 Periodic inspection. Periodic inspection shall consist of group B inspections. Except where the results of these
inspections show noncompliance with the applicable requirements (see 4.5.2.1.4). The delivery of products which have
passed group A 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 inspections specified in tables XII and XIII in the
order shown. Group B inspection shall be made on sample units which have passed the group A inspections
4.5.2.1.1 Sampling plan (group B). Six connectors assemblies with the largest number of contacts (with a full
complement of contacts) shall be selected from each specification sheet for which qualification is desired, 36 months after
the date of notification of qualification and after each subsequent 36 month period.
TABLE XII. Group B inspection.
Inspection
Requirement
Test
paragraph
method
paragraph
Group I (2 samples)
Visual and mechanical inspection
Insulation resistance
Dielectric withstanding voltage
Contact resistance
Engagement and separation forces
(board side)
Individual contact engagement and
separation forces
4.6.6.1
Test I 1/
Test II 2/
Total engagement force 1/
Contact resistance
Temperature cycling
Shock
Bond strength, body assembly
Contact retention 3/
See footnotes at the end of the table.
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