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National Stock Number:
4820-00-564-9891
Federal Supply Class:
4820
National Item Identification Number:
005649891
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:
| 8511447 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| BODY INSIDE DIAMETER | 0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM | | BODY OUTSIDE DIAMETER | 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM | | FLANGE DIAMETER | 0.432 INCHES MINIMUM AND 0.442 INCHES MAXIMUM | | FLANGE SEAT TO DISK END HEIGHT | 0.188 INCHES NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-325 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | ALUMINUM ALLOY OVERALL | | SEAT ANGLE IN DEG | 45.000 NOMINAL | | SEATING SURFACE SHAPE | ANGULAR | | STYLE DESIGNATOR | PLAIN FLANGED | | TAPER MAJOR DIAMETER | 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM | | TAPER MINOR DIAMETER | 0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM | | TAPER LENGTH | 0.625 INCHES NOMINAL | | UNDER FLANGE HEIGHT | 0.438 INCHES NOMINAL |
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