MIL-P-18716C
lot and only one tubing heat treat lot.
4.5.2 Inspection. Unless otherwise specified in the contract or urchase order (see 6.2), 105 samples shall be selected at random from each production lot for test and examination in accordance with the quality conformance inspection plan of table 1.
4.6 Classification of characteristics. The characteristics verified by the tests and examination herein are classified as critical, major, or minor in accordance with DOD-STD-2101. Requirements for critical characteristics are identified by the symbol (C) and major characteristics by the symbol (M). The number following the classification symbol indicates the serial number of the characteristic. Requirements not annotated with a classification code are classified as minor.
4.7 Methods of inspection.
4.7.1 Radiographic. The primer shall be subjected to a radiographic inspection in accordance with MIL-STD-453. The primer shall be mounted in the vertical position with the primer stock up and X-rayed perpendicular to its axis, focused at a point 0.6 + 0.2 inch from the stock face. Any primer which meets the requirements of 3.3 but appears to have been misassembled shall be subjected to detail strip and shall meet the requirements of 3.5.
4.7.2 Determination of moisture content. Moisture analysis procedure for the black powder shall be as follows:
a. Ten grams (10.0 g) black powder from each sample primer shall be tested in the granular form for moisture content.
b. The black powder shall be removed from primer tubes and placed in a dry container with a tight cover. Black powder shall not be exposed to the atmosphere for more than 3 minutes.
c. Sample containers must be covered and placed in a desiccator until ready to test the moisture content.
d. Carefully weigh 2.0 + 0.1 grams of sample into a tared weighing dish or container. The sample shall be weighed to the nearest 0.1 mg. Black powder shall not be exposed to the atmosphere for more than 3 minutes.
e. Uncovered samples shall then be placed in an oven at 70 to 75•C. Do not draw vacuum.
f. After 4 hours minimum (4 1/2 hours maximum), remove samples from oven, cover and place in a desiccator to cool. After cooling, carefully weigh samples to the nearest 0.1 mg. calculate the percent moisture as follows:
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