MIL-L-14576F
3.2.2 Measuring and indicating devices. Unless otherwise specified (see 6.2.1),
measuring and indicating devices shall be graduated in both the US and SI systems of
measurement. When a dual US and SI system is furnished, feed dials shall have
independent zero adjustments and shall be calibrated so that the last dial
graduation progresses into, and is continous with, the first dial graduation as the
dial is rotated through the zero position. When only one system of graduation is
acceptable, the particular graduation required shall be as specified (see 5.2. 1).
Regardless of' the measurement system used, all measuring and indicating devices on
the machine shall be graduated in the same system.
* 3.3 Material. Materials not specifically designated herein or in the contract
shall be of a quality commensurate with commercial practices, shall be suitable for
the intended purpose in the design and fabrication of the end item, and shall meet
all requirements specified herein. Materials shall be free from defects which would
affect the performance, maintainability, reliability, durability, or longevity of
the individual components or the end item equipment. When dissimilar metals are
used in contact with each other, suitable protection against galvanic corrosion
shall be applied in accordance with MIL-STD-889.
* 3.3.1 Raw materials. The manufacturer may use reclaimed materials for
fabricating new parts. Reclaimed materials shall be reprocessed, remanufactured, or
recycled in a manner that restores them to the same chemical composition and
physical properties as the raw materials originally selected for use. Use of
reclaimed parts as is or rebuilt from scrap or other used equipment shall not be
permitted.
* 3.4 Fabrication. The end item of equipment shall be constructed of parts which
are new, without defects and free of repairs. The structure shall be capable of
withstanding all forces encountered during operation of the end item of equipment,
to its maximum rating and capacity, without permanent distortion.
* 3.4.1 Castings and forgings. Finished castings and forgings shall be free of
fins, scale, inclusions, cold shuts, voids, cracks, thermal ruptures, laps, folds,
mismatching, or other defects. No processes such as welding, peening, plugging,
soldering, or pasting shall be used for repairing, reworking, or improving cosmetic
appearance.
* 3.4.2 Welding, brazing, and soldering. All welding, brazing, and soldering shall
be free of defects and of a quality which shall sustain all requirements of the
welded, brazed, or soldered parts. Defects shall include but are not limited to
such things as bubbles, cracks, gouges, holes, and insufficient materials used. All
flux or other such materials used during these operations shall be thoroughly
removed (cleaned), from the part(s) immediately upon completion of the operation.
These operations shall not be employed as repair measures for defective parts.
* 3.4.3 Fastening Devices. Fastening devices and methods shall be chosen to serve
the need while providing necessary adjustability for service, maintenance or repair.
Fasteners shall be installed to prevent loss of tightness and shall not loosen in
service.
3.4.4 Electrical connections. Connections to screw-type terminals shall be
mechanically secured with means to prevent loss of tightness. All other electrical
connections shall be mechanically secured and soldered or brazed. Only rosin base
fluxes shall be used in soldering operations.
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