4820-00-216-9018 DIAPHRAGM,VALVE,FLAT Index 4820-00-216-9021 SEAT,VALVE

National Stock Number:
4820-00-216-9019

Federal Supply Class:
4820

National Item Identification Number:
002169019

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.


Manufacturer Information:
C302986184GRISWOLD INDUSTRIES
C3029A86184GRISWOLD INDUSTRIES


Techincal Specification:
BODY STEPPED INSIDE DIAMETER8.001 NOMINAL MILS FIRST STEP AND 8.005 NOMINAL CENTIMETERS FIRST STEP
BODY STEPPED INSIDE DIAMETER8.130 NOMINAL INCHES SECOND STEP
FLANGE DIAMETER9.500 INCHES NOMINAL
FLANGE SEAT TO DISK END HEIGHT0.625 NOMINAL INCHES
MATERIALNICKEL ALLOY OVERALL
PROPRIETARY CHARACTERISTICSPACS
NOMINAL THREAD SIZE9.000 INCHES SINGLE THREADED PORTION
SEATING SURFACE SHAPEANGULAR
SEAT ANGLE IN DEG5.000 NOMINAL
STYLE DESIGNATORTHREADED FLANGED
THREAD CLASS2A SINGLE THREADED PORTION
THREAD LENGTH0.7700 INCHES MINIMUM SINGLE THREADED PORTION AND 0.800 INCHES MAXIMUM SINGLE THREADED PORTION
THREAD QUANTITY PER INCH12 SINGLE THREADED PORTION
THREAD SERIES DESIGNATORUNS SINGLE THREADED PORTION
UNDER FLANGE HEIGHT1.000 INCHES NOMINAL


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