MIL-DTL-3971F
(Copies of this document are available online at https://www.ansi.org or from the American
National Standards Institute, 2 5 W e s t 4 3 r d S t r e e t , 4 f l o o r , N e w Y o r k , N Y 1 0 0 3 6 .)
2.4 Order of precedence. If there is conflict between the text of this document and the
references cited herein (except for related specification sheets), the text of this document takes
precedence. Nothing in this document, however, supersedes applicable laws and regulations
unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Specification sheets. The individual item requirements shall be as specified herein and in
accordance with the applicable specification sheet. In the event of any conflict between
requirements of this specification and the detailed specification, the latter shall govern.
3.1.1 Reference to detail specification. For the purpose of this specification, when the terms
"specified" or "as specified" are used without reference to a specific document, the intended
reference is to the detailed specification.
3.2 Qualification. Time totalizing meters furnished under this specification shall be products
that are authorized for listing on the applicable qualified products list before contract award (see
4.2 and 6.3).
3.3 Materials. All materials shall be of uniform quality and free of defects which might
impair the functioning or accuracy of the meters. Material which is not specified by a definite
material specification shall be of a composition and quality that will enable the meters to meet all
applicable requirements of this specification.
3.3.1 Fungus-proof materials. Materials that are nutrients for fungi shall not be used where it
is practical to avoid them. Where used, they shall be treated with a suitable fungicidal agent.
3.3.2 Protective treatment. All parts of the meter, except those whose proper function would
be detrimentally affected, shall be protected by a finish capable of resisting corrosion, crazing, or
cracking due to fuel, salt spray, common solvents or atmospheric conditions which are likely to
be encountered in storage or service.
3.3.3 Dissimilar metals. Dissimilar metals, as defined in MIL-STD-889, shall not be used in
intimate contact with each other unless suitably protected against electrolytic corrosion.
3.4 Design and construction. Meters shall be in accordance with the applicable detailed
specification and the requirements specified herein. The design shall assure that parts will not
work loose in service. The meters shall be constructed to withstand the normal hazards incident
to shipping, storage and service.
3.4.1 Case. The dimensions of the case shall be in accordance with MIL-DTL-3971/1 and /2.
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