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		                             National Stock Number: 4820-01-199-8743
  Federal Supply Class: 4820
  National Item Identification Number: 011998743
  Description: SEAT,VALVE
  Detail: A replaceable item designed to provide a circular stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see INSERT, ENGINE VALVE SEAT. 
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  Manufacturer Information:
 | 23399 | 57574 | VELAN VALVE CORP. |  | 23399REVM PIECE 5 2IN | 57574 | VELAN VALVE CORP. |  | 2557-073-046-S | 57574 | VELAN VALVE CORP. |  | 2557-73-69 | 57574 | VELAN VALVE CORP. |   
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  Techincal Specification:
 | STYLE DESIGNATOR | PLAIN FLANGED |  | FLANGE DIAMETER | 1.828 INCHES NOMINAL |  | BODY OUTSIDE DIAMETER | 1.622 INCHES MINIMUM AND |   | 1.625 INCHES MAXIMUM |  | BODY INSIDE DIAMETER | 1.495 INCHES MINIMUM AND |   | 1.505 INCHES MAXIMUM |  | FLANGE SEAT TO DISK END HEIGHT | 0.763 INCHES MINIMUM AND |   | 0.764 INCHES MAXIMUM |  | UNDER FLANGE HEIGHT | 0.374 INCHES MINIMUM AND |   | 0.383 INCHES MAXIMUM |  | MATERIAL | STEEL OVERALL |  | SEATING SURFACE SHAPE | ANGULAR |  | SEAT ANGLE IN DEG | 7.000 NOMINAL |   
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