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		                        | National Stock Number:
 4820-00-479-3457
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 004793457
 
 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:
 
 | H2257PC53 | 16712 | SIEMENS ENERGY, INC. |  | H2259PC53 | 16712 | SIEMENS ENERGY, INC. |  | KJ62ZX2 | 16712 | SIEMENS ENERGY, INC. | 
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 Techincal Specification:
 
 | BODY INSIDE DIAMETER | 3.500 INCHES MINIMUM AND 3.501 INCHES MAXIMUM |  | BODY OUTSIDE DIAMETER | 5.989 INCHES MINIMUM AND 5.990 INCHES MAXIMUM |  | FLANGE DIAMETER | 7.460 INCHES MINIMUM AND 7.480 INCHES MAXIMUM |  | FLANGE SEAT TO DISK END HEIGHT | 0.750 NOMINAL INCHES |  | MATERIAL DOCUMENT AND CLASSIFICATION | HAYNES STELLITE NO 6 MFR REF SINGLE MATERIAL RESPONSE FACE |  | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-861,CLASS 405 MIL SPEC SINGLE MATERIAL RESPONSE BODY |  | MATERIAL | STEEL BODY |  | MATERIAL | STEEL FACE |  | PROPRIETARY CHARACTERISTICS | PACS |  | SEAT RADIUS | 0.375 INCHES NOMINAL |  | SEATING SURFACE SHAPE | RADIAL |  | STYLE DESIGNATOR | PLAIN FLANGED |  | TAPER LENGTH | 6.047 NOMINAL INCHES |  | TAPER MAJOR DIAMETER | 4.921 INCHES NOMINAL |  | TAPER MINOR DIAMETER | 3.500 INCHES MINIMUM AND 3.501 INCHES MAXIMUM |  | UNDER FLANGE HEIGHT | 4.547 INCHES NOMINAL | 
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