| 
                            
                                |  |  
                                |   |  
		                        | National Stock Number:
 4820-00-287-6593
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 002876593
 
 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.
 |  
		                        | 
 Manufacturer Information:
 
 | 3173-057 | 60029 | WOODWARD HRT, INC. |  | 3173-057 | 81873 | WOODWARD HRT INC | 
 |  
					            | 
 Techincal Specification:
 
 | MATERIAL | STEEL OVERALL |  | HARDNESS RATING | 58.0 ROCKWELL C MINIMUM AND |  |  | 62.0 ROCKWELL C MAXIMUM OVERALL |  | SEATING SURFACE SHAPE | ANGULAR |  | SEAT ANGLE IN DEG | 30.000 NOMINAL |  | THE MANUFACTURERS DATA |  |  | MANUFACTURERS CODE | 81873 |  | DESIGN CONTROL REFERENCE | 3173-057 | 
 |  |