MIL-STD-407
15 February 1957
FOREWORD
Government material procurement specifications have been primarily con-
cerned with detailing composition, construction and necessary physical re-
quirements. However, little attention has been paid to defining the limits of
acceptable quality regarding manufacturing defects other than such general-
izations as "the workmanship shall be first class". In such a diverse industry
as that of rubber manufacturing, individual plants vary considerably in their
p r o d u c t i o n and quality control techniques. Defects are likely to occur
from many causes such as variation in the quality of the basic materials
and variations in manufacturing processes and finishing operations. Therefore,
the quality generalizations used in this document must of necessity cover a
considerable range which represents the best available judgment. This docu-
ment is issued as a practical yardstick which Inspectors w-ill use to appraise
visually the quality of rubber molded items.
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