A-A-2681
4. QUALITY ASSURANCE PROVISIONS.
4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, 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 that supplies and services conform to prescribed requirements.
4.2 Sampling. The levels of inspection and acceptable quality levels (AQLs) shall be in accordance with MIL-STD-105.
4.3 Lot formation. A lot shall consist of the material processed by one manufacturer, subjected to the same manufacturing and processing conditions. Each lot shall contain plastic sheet or roll of one type, class and size. The lot size, for purpose of determining the sample size, shall be expressed in units of packages of sheets or rolls, as applicable.
4.4 Sampling for visual and dimensional examination. A random sample of plastic sheet or rolls shall be selected from each lot in accordance with special inspection level S-2, AQL 2.5 expressed in terms of defects per hundred unit. The sample unit shall be one flat sheet or one complete roll. The sample plastic sheets or rolls shall be visually and dimensionally examined to verify compliance with this description. Tolerance limits specified are absolute limits as defined in ASTM E 29.
4.5 Sampling for tests. A random sample of plastic sheets or rolls shall be selected from each lot in accordance with special inspection level S-1, AQL 2.5 expressed in terms of percent defective. The sample unit shall be one sheet or one roll. One square foot of plastic sheet shall be taken for test purpose from each sample roll.
4.6 Testing.
4.6.1 Conditioning test specimens and test conditions. Test specimens shall be conditioned in accordance with ASTM E 171 and tested under these conditions, unless otherwise specified in the referenced specification.
4.6.2 Plastic sheet. The plastic sheet before coating shall be tested in accordance with the test methods specified in L-P-504 or L-P-377 as applicable.
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