A-A-2523B
3.4.1.3 Aluminum alloy. If the frame is constructed
of extruded aluminum, it shall be finished with either a chemical satin or
caustic etch with a clear or black anodized finish, or chemically bright dipped
and coated with polyvinyl acetate resin of epoxy powder for corrosion
resistance.
3.4.1.4 Glass reinforced nylon. If the frame is constructed of glass
fiber reinforced nylon 6, it shall be either silver or black in color.
3.5 Lid and bottom plastic shells. Both the lid and bottom shells of the
case shall be molded of the same material. The material shall be high impact
strength plastic, either acrylonitrile butadiene styrene (ABS), polypropylene,
or high density polyethylene. If separate frame is used, the shells shall be
attached to the frame by crimping, or crimping and riveting (including
stapling). The method of attachment to the frame shall result in complete
adherence of the shells to the frame. The shell shall show no evidence of
cracking or crazing. When drop tested the shells shall show no cracking, corner
dimpling, fractures, or punctures, and the shells shall not separate from the
frame in any way.
3.6 Exterior shell finish. The exterior finish of the plastic shells
shall be uniformly coarse-grained and the exterior color of the case shall be
black.
3.7 Handle. The case shall have a handle designed and constructed of
material suitable for carrying the case. The handle shall be either plastic,
metal or a combination of both and the same color as the case shell. The handle
shall be securely fastened to the frame. The method of attaching the handle to
the frame shall present a neat and finished appearance and shall not pose any
possible user hazards such as sharp edges or protrusions. When the handle is
tested as specified, it shall not be permanently deformed, or become loosened
or detached.
3.8 Hardware. The hardware finish shall match the finish of the frame
and may be either painted, chrome or copper/nickel plated. The hinges may be
coated with baked enamel having a natural metallic appearance or with a clear
lacquer in order to match the frame finish. When the briefcase is drop tested
the hardware shall not crack, fracture, or become loose or detached from the
assembly. When drop tested the latches shall remain closed and shall operate as
designed.
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