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		                        | National Stock Number:
 4820-00-690-0345
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 006900345
 
 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:
 
 | 52ND6602 | 82328 | DRESSER RAND CO TERRY CORP STEAM TURBINE MOTOR AND GENERATOR CO A JOINT VENTURE |  | 52ND6602 | 83238 | GEM-DANDY INC |  | 700302 | 0B5H6 | NIANTIC TOOL, INC. |  | 717085 | 0BR59 | SIEMENS GOVERNMENT TECHNOLOGIES, INC. |  | 717085 | 82328 | DRESSER RAND CO TERRY CORP STEAM TURBINE MOTOR AND GENERATOR CO A JOINT VENTURE |  | 717085 | 830Q4 | CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION |  | B2364 | 0B5H6 | NIANTIC TOOL, INC. |  | 900068 | 0DKH2 | EVANS LEE INC |  | ND6626PC52 | 83238 | GEM-DANDY INC |  | 717085 | 8FGX3 | CURTISS-WRIGHT ELECTRO-MECHANICAL CORP |  | 717085 | 93235 | TURBODYNE DIV OF DRESSER INDUSTRIES INC SEE CODE 0BR59 | 
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 Techincal Specification:
 
 | STYLE DESIGNATOR | PLAIN FLANGED |  | FLANGE DIAMETER | 1.998 INCHES MINIMUM AND |  |  | 1.999 INCHES MAXIMUM |  | BODY OUTSIDE DIAMETER | 1.876 INCHES MINIMUM AND |  |  | 1.877 INCHES MAXIMUM |  | BODY INSIDE DIAMETER | 1.124 INCHES MINIMUM AND |  |  | 1.126 INCHES MAXIMUM |  | FLANGE SEAT TO DISK END HEIGHT | 0.375 INCHES NOMINAL |  | UNDER FLANGE HEIGHT | 0.250 INCHES NOMINAL |  | MATERIAL | STEEL COMP 303 OR |  |  | STEEL CORROSION RESISTING OVERALL |  | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763,CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE OR |  |  | QQ-S-763,CLASS 416 FED SPEC SINGLE MATERIAL RESPONSE BODY |  |  | MIL-R-17131,TYPE MIL-RCOCR-A MIL SPEC SINGLE MATERIAL RESPONSE FACE |  | SURFACE TREATMENT | PASSIVATE OVERALL |  | SEATING SURFACE SHAPE | ANGULAR |  | SEAT ANGLE IN DEG | 25.000 NOMINAL | 
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