MIL-DTL-39000C
3.4 Surface roughness. When measured as specified in 4.6.2, flange surface roughness (in root mean square
microinches) shall not exceed the value specified (see 3.1).
3.5 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.
3.6 Marking. Waveguide flanges shall be marked in accordance with MIL-STD-1285, with the PIN and the
manufacturer's source code. The numbers shall be marked in depressed or raised characters in proportion to the
size of the flange and at least .031 inch high, in the place specified (see 3.1).
3.7 Workmanship. Waveguide flanges shall be produced in such a manner as to be uniform in quality and all
surfaces shall be free from burrs, die marks, chatter marks, scratches, dirt, grease, scale, splinters 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 quantity to permit performance of the required inspection shall be established and maintained
by the contractor.
4.2 Classification of inspections. The inspections specified herein are classified as follows:
a. Materials inspection (see 4.3).
b. Conformance inspections (see 4.5).
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 waveguide flanges, are in accordance with the applicable referenced
specifications or requirements prior to such fabrication.
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 Conformance inspection.
4.5.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A inspection.
4.5.1.1 Inspection lot. An inspection lot shall consist of all waveguide flanges of the same PIN produced under
essentially the same conditions, and offered for inspection at one time.
TABLE I. Materials inspection.
Requirement
Applicable
Material
paragraph
specification
Copper alloys:
Bar stock:
Leaded red brass
Naval brass
Free-cutting brass
Casting (tin bronze)
Forging:
Leaded brass
Naval brass
Free-cutting brass
Aluminum alloys:
Bar stock and forging
Sand casting
Die casting
3.2.2.3
Permanent mold casting
Silicone rubber
4
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