MIL-V-46727 Valve, Three Position, Four Way, Hydraulic, Manual Use Mil-Dtl-46725This specification covers two types of manually operated, three-position, four-way, hydraulic directional control valves with an operating pressure of 3000 pounds per square inch psi see 6.1.

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MIL-V-46727C(AT)

4.5 Quality conformance inspection.

4.5.1 Sampling.

4.5.1.1 Lot formation. An inspection lot shall consist of all the valves of one type and part number, from an identifiable production period, from one manufacturer, submitted at one time for acceptance.

4.5.1.2 Sampling for examination. Samples for quality conformance examination shall be selected in accordance with general inspection level II of MIL-STD-105. Before sampling may be initiated, the contractor shall establish by examination of at least 20 consecutively produced assemblies that the process average percent defective, as defined in MIL-STD-105, is not greater than the specified AQLs.

4.5.1.3 Sampling for test. Samples for tests shall be selected in accordance with level S-3 of

MIL-STD-105.

4.5.2 Examination.

4.5.2.1 Acceptable quality level. Each sample selected in accordance with 4.5.1.2 shall be examined to determine conformance to the following acceptable quality levels (AQL).

Classification AQL Major 1.0

Minor 2.5

4.5.2.2 Classification of defects. For examination purposes, defects shall be classified as listed in table II.

TABLE II. Classification of defects.