MIL-DTL-28837C
3.23 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
3.24 Workmanship. Mixers shall be manufactured and processed in such a manner as to be uniform in quality,
and the shell of the mixer shall be free from tool marks, burrs, deep scratches, and other defects that will affect life,
serviceability, or appearance.
4. VERIFICATION
4.1 Test equipment and inspection facilities. Test and measuring equipment and inspection facilities of sufficient
accuracy, quality, and quantities to permit performance of the required inspection shall be established and maintained
by the contractor. The establishment and maintenance of a calibration system to control the accuracy of the
measuring and test equipment shall be in accordance with NCSL- Z540.3.
4.2 Classification of inspections. The inspections specified herein are classified as follows:
Materials inspection (see 4.3).
a.
b.
Qualification inspection (see 4.5).
c.
Conformance inspection (see 4.6).
4.3 Materials inspection. Materials inspection shall consist of certification supported by verifying data that the
materials listed in table I, used in fabricating the mixers, are in accordance with the applicable referenced
specifications or requirements prior to such fabrication.
TABLE I. Materials inspection.
Material
Requirement
Applicable
paragraph
specification(s)
ASTM-B26/B26M, ASTM-B85/B85M, ASTM-B108/B108M,
ASTM-B209, ASTM-B221, ASTM-B241/B241M, ASTM-
Aluminum
B308/B308M, SAE-AMS4290, SAE-AMS4291, SAE-AMS-QQ-
A-250, SAE-J452
Nickel-Iron Alloy
SAE-AMS-I-23011
Brass
ASTM-B16/B16M, ASTM-B36/B36M, ASTM-B121/B121M,
ASTM-B124/B124M
Copper
ASTM-B36/B36M, ASTM-B121/B121M, ASTM-B194,
ASTM B196/B196M
Steel
ASTM-A582/A582M, ASTM A484/A484M
ASTM-A240/240M, ASTM-A666, ASTM-A693, SAE-AMS5511,
MIL-P-24691/3
Plastics
ASTM-D5948, ASTM D4894, ASTM D4895, ASTM D1710
Finish
MIL-DTL-45204, SAE-AMS2404, ASTM-B700, SAE-AMS2422,
ASTM-B488, SAE-AMS-QQ-N-290
4.4 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in accordance with
the test conditions specified in the "GENERAL REQUIREMENTS" of MIL-STD-202.
4.5 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable to the
Government (see 6.3) on sample units produced with equipment and procedures normally used in production.
4.5.1 Sample size. Four mixers of each PIN, for which qualification is sought, shall be subjected to qualification
inspection.
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