MIL-S-4953C(USAF)
3.28.3 Screw assemblies. Assembly screws and bolts shall be tightened to the specified torque values for these assemblies.
3.28.4 Riveting. Riveting operations shall be carefully performed to insure that the rivets are tight and satisfactorily headed.
3.28.5 Welding. Where welding, brazing, or soldering is used in the fabrication of the spray outfit, the process used shall be in accordance with the highest commercial standards. No welding shall be resorted to as a repair measure, except that small blowholes in castings may be filled when not in critical areas provided that the procuring activity is fully informed of all pertinent details and approves the repair procedure prior to its accomplishment.
3.28.6 Cleaning. The spray outfit shall be thoroughly cleaned of loose spattered, or excess solder, metal chips, and other foreign material after final assembly. Burrs and sharp edges, as well as resin flash that may crumble, shall be removed.
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, the supplier may utilize his own facilities or any commercial laboratory acceptable to 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.
4.2 Classification of tests. The inspection and testing of the spray outfits shall be classified as follows:
a. Preproduction tests. b. Acceptance tests.
4.3 Test conditions.
4.3.1 Apparatus. All instruments and apparatus used in determining the testresults specified herein shall be of laboratory precision type and shall be in current calibration.
4.3.2.1 Liquid flow rates. Liquid flow rates shall be determined by weighing the efflux or by measuring a known volume over a time interval of not less than five minutes. Flowmeters shall not be used unless specifically approved by the procuring activity.
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