MIL-PRF-26H
4.4.1 Sample size. The number of sample units comprising a sample of resistors to be submitted for qualification
inspection shall be as specified in the appendix to this specification.
4.4.2 Inspection routine. Sample units shall be subjected to the qualification inspection specified in table II, in the
order shown. All coated or enclosed sample units, except those for the solderability test in group II and the uncoated
or unenclosed for group VI, shall be subjected to the inspection of group I. The 30 tab-terminal sample units, 15 of
the highest resistance value and 15 of the lowest resistance value or 10 ohms, whichever is higher, 50 axial-terminal
units of the critical value, 10 each for groups II through group V (when applicable) (see A.2.1.2), and 50 axial-terminal
sample units, 25 of the highest resistance value and 25 of the lowest resistance value or 10 ohms, whichever is
higher, shall then be divided as specified in table II, for groups II to group V, inclusive, and subjected to the inspection
of their particular group. The two uncoated, or unenclosed sample units shall then be subjected to the visual and
mechanical examination of group VI inspection only.
4.4.3 Failures. Failures in excess of those allowed in table II shall be cause for refusal to grant qualification
approval.
4.5. Retention of qualification. Every 12 months, the manufacturer shall compile a summary of the results of
conformance inspections, in the form of a retention of qualification report and forward it to the qualifying activity,
within 30 days from the end of the reporting period as the basis of continued qualification approval. In addition, the
manufacturer shall immediately notify the qualified activity whenever the group B inspection data indicates failure of
the qualified product to meet the requirements of the specification. Retention shall be based on evidence that over
the 1-year period, the following has been met:
a.
The manufacturer has not modified the design of the item.
b.
The specification requirements for the item have not been amended so far as to affect the character of the
item.
c.
Lot rejection for group A inspection does not exceed the group A sampling plan.
d.
The requirements for group B inspection are met.
When group B requirements are not met and the manufacturer has taken corrective action satisfactory to the
government, group B retesting shall be instituted.
4.5.1 Alternate inspection. For the purpose of retention of qualification and conformance inspection (see 4.5 and
4.6), test data on identical items covered by MIL-PRF-39007 may be used.
4.6 Conformance inspection.
4.6.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A and group B
inspections. Group B inspection for preparation of delivery is not required when the qualifying activity has allowed
group B testing to be performed annually (see table V).
4.6.1.1 Inspection lot. An inspection lot, as far as practical, shall include resistors of any style without regard to
resistance value or resistance tolerance, produced under essentially uniform conditions and offered for inspection at
one time. Resistors that differ in design, construction, materials, and terminal type shall not be included in one lot.
4.6.1.1.1 Production lot. A production lot consists of parts manufactured from the same basic raw materials,
processed under the same specifications and procedures, and produced with the same equipment. Each production
lot of parts should be a group identified by a common manufacturing record through all significant manufacturing
operations.
9
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business