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Page Title:
Steel and other metal fabrication |
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|  MIL-T-17491H(SA)
Screw threads shall be in accordance with Handbook
3.13.2.1 Screw threads.
H28.
3.13.3 Steel and other metal fabrication. Metals used in the fabrication of
the trucks shall provide original quality surface finish and shall be free from
kinks and sharp "bends. Metals "having corroded or pitted surfaces are not
acceptable. The straightening of materials shall be done by methods that will
not cause weakening or injury to the material. Burrs and sharp edges in holes
and on sheets, plates, and members shall be removed sufficiently to assure
correct fits and to prevent loosening of fasteners and damage to components.
Flame cutting with a tip suitable for the thickness of metal may be employed
instead of shearing or sawing. Splatter shall be removed from exposed cuts and
from re-entrant cuts. Heated metals shall `be allowed to cool slowly, except in
the performance of designed heat treatment, and overheating shall be avoided in
accordance with the recommendations of the metal manufacturer. All modular
assembly fabrication shall provide for interchangeability of components.
3.13.4 Machine work. All parts shall be manufactured to insure accuracy of
assembly through the use of correct jigs, fixtures, or tape controlled machines
or any combination thereof. Like parts shall "be interchangeable.
3.14 Welds. Welded joints shall be sound, smooth, free from pits, holes,
fissures, rough projecting edges, and slag and shall be thoroughly fused to the
base metal. The surfaces of parts to be welded shall be free from rust, scale,
paint, grease, and other foreign matter. Welds shall transmit stress without
permanent deformation or failure when the parts connected by the welds are
subjected to proof and service loading.
3.15 Vehicle marking. The assigned registration number for each truck shall
be painted in black enamel, in block numbers 3 inches (76 mm) high by 1/2 inch
(12 mm) line width in a prominent place a truck" body.
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the contract
or purchase order, the supplier is responsible for the performance of all
inspection requirements as specified "herein. Except as otherwise specified in
the contract or order, the supplier may use his own or any other facilities for
the performance of the inspection requirements specified herein, unless
disapproved by the Government. The Government reserves the right to perform
any of the inspections set forth in the specification where such inspections
are deemed necessary to assure supplies and services conform to prescribed
requirements.
4.1.1 Component and material inspection. . The supplier is responsible for
insuring that components and materials used are manufactured, examined, and
treated in accordance with referenced specifications and standards
4.2 Classification of inspection. Inspection shall be classified as follows:
(a) Preproduction inspection {see 4.3).
(b) Quality conformance inspection (see 484).
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