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National Stock Number:
4820-00-714-4839
Federal Supply Class:
4820
National Item Identification Number:
007144839
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:
| 83933 | 81982 | HYDRO-AIRE AEROSPACE CORP |
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Techincal Specification:
| BODY INSIDE DIAMETER | 0.498 INCHES MINIMUM AND 0.502 INCHES MAXIMUM | | BODY OUTSIDE DIAMETER | 0.749 INCHES MINIMUM AND 0.751 INCHES MAXIMUM | | FLANGE DIAMETER | 0.860 INCHES MINIMUM AND 0.861 INCHES MAXIMUM | | FLANGE SEAT TO DISK END HEIGHT | 0.093 INCHES NOMINAL | | HARDNESS RATING | 58.0 ROCKWELL C MINIMUM AND 61.0 ROCKWELL C MAXIMUM BODY | | HARDNESS RATING | 58.0 ROCKWELL C MINIMUM AND 61.0 ROCKWELL C MAXIMUM FACE | | MATERIAL | STEEL COMP 440C OVERALL | | SEAL ACCOMMODATION TYPE | GROOVED | | SEATING SURFACE SHAPE | FLAT | | STYLE DESIGNATOR | PLAIN FLANGED | | SURFACE TREATMENT | PASSIVATE OVERALL | | UNDER FLANGE HEIGHT | 0.297 INCHES NOMINAL |
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