National Stock Number: 4820-00-450-9270
  Federal Supply Class: 4820
  National Item Identification Number: 004509270
  Description: DIAPHRAGM,VALVE,FLAT
  Detail: An item in the form of one or more thin flexible sheets normally designed to form a tight seal between chambers of a valve, and to transmit motion to a valve disk either directly or through a mechanical linkage. The surface of the item(s) may not be formed or molded to have a beaded or rolled edge, ribs, or any other raised surfaces. The item may contain bolt holes and/or a center hole. Excludes DIAPHRAGM, VALVE, SPECIAL SHAPED and GASKET. 
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