MIL-DTL-13931J
4.3.4 Classification of characteristics. The classification of characteristics is contained in the referenced
specification or in the applicable QAP for a part, subassembly or assembly. The following provisions
shall apply:
a. ASQ Z1.4 (see 6.2), or other system approved by the Procuring Contracting Officer shall be used
for all characteristics.
b. Grouping of requirements in a classification of characteristics shall not reduce the contractor's
responsibility to follow the drawing requirements, nor remove the need for inspection of
the requirement.
4.4 Inspection method. The following provisions shall be applicable to the prescribed inspection
methods. Request for a method other than that specified shall be submitted to the Procuring Contracting
Officer for approval.
a. When Special Inspection Equipment (SIE) is specified, the characteristic shall be inspected
with inspection equipment conforming to the specified drawing or approved equivalent.
b. When Standard Measuring and Test Equipment (SMTE) is specified, the characteristics shall be
inspected with commercial or standard measuring and test equipment, subject to the approval of
the Government representative.
c. When a Special Test Method (STM) is specified, the characteristics shall be subjected to the
test method or procedure specified in the applicable QAP.
d. When "visual" is specified, the characteristic, whenever possible, shall be compared with a
specimen of known acceptable quality.
e. When "manual" is specified, the sample shall be checked for tightness, protrusion, operation or
similar condition, as applicable.
4.5
Inspection provisions.
4.5.1 Parts. Parts shall be inspected before assembly. Materials, protective coatings, threads, surface
roughness, marking, and workmanship shall be inspected in accordance with the applicable drawings,
QAPS, and this specification.
4.5.2 Control of purchased components. MS, commercial or special design components received from
vendors in support of in-house manufacture or assembly shall be identified to the individual contractor
(3.4.7.6.2) and contract number from the time received until used in manufacture or assembly.
Components shall be issued from a single vendor lot until that lot is exhausted. Lots shall not be mixed.
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