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National Stock Number:
4820-01-104-6770
Federal Supply Class:
4820
National Item Identification Number:
011046770
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:
| 6859371 | 29953 | SPACE AGE ENGINEERING INC | | 6859371 | 63005 | ROLLS-ROYCE CORPORATION | | 6859371 | 73342 | ALLISON TRANSMISSION INC | | 6859371 | 98072 | PRECISION PIECE PARTS INC |
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Techincal Specification:
| STYLE DESIGNATOR | PLAIN FLANGED | | FLANGE DIAMETER | 1.122 INCHES MINIMUM AND | | 1.123 INCHES MAXIMUM | | BODY OUTSIDE DIAMETER | 1.008 INCHES MINIMUM AND | | 1.012 INCHES MAXIMUM | | FLANGE SEAT TO DISK END HEIGHT | 0.259 INCHES NOMINAL | | UNDER FLANGE HEIGHT | 0.165 INCHES MINIMUM AND | | 0.170 INCHES MAXIMUM | | BODY STEPPED INSIDE DIAMETER | 0.500 INCHES MINIMUM AND | | 0.505 INCHES MAXIMUM FIRST STEP | | 0.920 INCHES NOMINAL SECOND STEP | | 0.978 INCHES MINIMUM AND | | 0.983 INCHES MAXIMUM THIRD STEP | | MATERIAL | STEEL OVERALL | | HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND | | 36.0 ROCKWELL C MAXIMUM OVERALL | | SEATING SURFACE SHAPE | RADIAL | | SEAT RADIUS | 0.030 INCHES MINIMUM AND | | 0.040 INCHES MAXIMUM |
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