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National Stock Number:
4820-00-216-9094
Federal Supply Class:
4820
National Item Identification Number:
002169094
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:
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Techincal Specification:
| STYLE DESIGNATOR | THREADED FLANGED | | FLANGE DIAMETER | 3.242 INCHES MINIMUM AND | | 3.246 INCHES MAXIMUM | | BODY INSIDE DIAMETER | 1.438 INCHES MINIMUM AND | | 2.250 INCHES MAXIMUM | | FLANGE SEAT TO DISK END HEIGHT | 1.422 INCHES NOMINAL | | UNDER FLANGE HEIGHT | 0.438 INCHES NOMINAL | | MATERIAL | STEEL COMP 414 OVERALL | | HARDNESS RATING | 22.0 ROCKWELL C MINIMUM AND | | 26.0 ROCKWELL C MAXIMUM OVERALL | | SEATING SURFACE SHAPE | ANGULAR | | SEAT ANGLE IN DEG | 45.000 NOMINAL | | THREAD SERIES DESIGNATOR | UNS SINGLE THREADED PORTION | | NOMINAL THREAD SIZE | 2.812 INCHES SINGLE THREADED PORTION | | THREAD QUANTITY PER INCH | 18 SINGLE THREADED PORTION | | THREAD CLASS | 3A SINGLE THREADED PORTION | | THREAD LENGTH | 0.438 INCHES NOMINAL SINGLE THREADED PORTION |
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