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National Stock Number:
4820-00-858-9981
Federal Supply Class:
4820
National Item Identification Number:
008589981
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:
| 1608397-1 | 99251 | MISSION SYSTEMS DAVENPORT INC. |
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Techincal Specification:
| BODY INSIDE DIAMETER | 0.076 INCHES MINIMUM AND 0.080 INCHES MAXIMUM | | FLANGE DIAMETER | 0.254 INCHES MINIMUM AND 0.256 INCHES MAXIMUM | | FLANGE SEAT TO DISK END HEIGHT | 0.073 INCHES NOMINAL | | MATERIAL | ALUMINUM ALLOY 2024 OVERALL | | NOMINAL THREAD SIZE | 0.250 INCHES SINGLE THREADED PORTION | | SEATING SURFACE SHAPE | RADIAL | | SEAT RADIUS | 0.016 INCHES NOMINAL | | STYLE DESIGNATOR | PLAIN FLANGED | | THREAD CLASS | 3A SINGLE THREADED PORTION | | THREAD LENGTH | 0.187 INCHES NOMINAL SINGLE THREADED PORTION | | THREAD QUANTITY PER INCH | 32 SINGLE THREADED PORTION | | THREAD SERIES DESIGNATOR | UNEF SINGLE THREADED PORTION | | UNDER FLANGE HEIGHT | 0.286 INCHES NOMINAL |
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