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|  MIL-T-52896B(ME)
3.16 Human factors engineering. The following Society of Automotive Engineers
specifications shall apply: J1500 (Universal Symbols), J614 (Dipstick Marking), J925
(Access Dimensions), J209 (Instrument Face Design). The mixer shall be designed to be operable
and maintainable by 5th through 95 percentile personnel (see SAE J833) who are dressed
appropriate to the environments of interest (32o F to 125oF). All valves shall be labeled
open/close, arrows shall be used to indicate direction of rotation, and all valves shall be labeled
with function served by the valve, i.e., "water valve" rather than valve 3. All operator relevant
components shall be labeled in terms that communicate to the operator.
3.17 Workmanship.
3.17.1 Steel fabrication. The steel used in fabrication shall be free from kinks, sharp bends,
and other conditions which would be deleterious to the finished product. Manufacturing
processes shall not reduce the strength of the steel to a value less than intended by the design.
Manufacturing processes shall be done neatly and accurately. All bends shall be made by
controlled means to insure uniformity of size and shape.
3.17.2 Bolted connections. All bolt holes shall be accurately punched or drilled and shall
have the burrs removed. Washers or lock-washers shall be provided. All nuts, bolts, and screws
shall be tight.
3.17.3 Riveted connections. All rivet holes shall be accurately punched or drilled and shall
have the burrs removed. Rivets shall completely fill the hole. Rivet heads shall be of an approved
shape and shall be concentric with the rivet. Rivet heads shall make full contact with the intended
surface. The rivets shall be so fabricated as to develop a joint strength not less than the design
value.
3.17.4 Welding. Surfaces of welds shall be free from imperfections which will be injurious to
the weldments. Welding procedures shall be in accordance with a nationally recognized code.
The contractor shall make available to the contracting officer certification that each manual
welder and automatic welding equipment operator has a current qualification as proscribed by
either AWS or ASME code. Welds shall be of sufficient size and shape to develop the full design
strength of the parts connected by the welds. Welds shall transmit imposed stresses without
permanent deformation or failure when subjected to proof or service loadings.
3.17.5 Listings. All castings shall be sound and free from patching, misplaced coring
warping, or any other defects which reduces the castings ability to perform its intended function.
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the contract the contractor is
responsible for the performance of all inspection requirements as specified herein. Except as
otherwise specified in the contract, the contractor may use his own or any other facilities suitable
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.
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