4820-00-394-7426 SEAT,VALVE Index 4820-00-394-7428 SEAT,VALVE

National Stock Number:
4820-00-394-7427

Federal Supply Class:
4820

National Item Identification Number:
003947427

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:
P-639A70667ATLAS VALVE CO


Techincal Specification:
BODY STEPPED INSIDE DIAMETER4.000 INCHES NOMINAL FIRST STEP
BODY STEPPED INSIDE DIAMETER4.125 INCHES NOMINAL SECOND STEP
FLANGE DIAMETER5.125 INCHES NOMINAL
FLANGE SEAT TO DISK END HEIGHT0.250 INCHES NOMINAL
MATERIALNICKEL ALLOY OVERALL
NOMINAL THREAD SIZE4.625 INCHES SINGLE THREADED PORTION
SEATING SURFACE SHAPEFLAT
STYLE DESIGNATORTHREADED FLANGED
THREAD CLASS2A SINGLE THREADED PORTION
THREAD LENGTH0.562 INCHES NOMINAL SINGLE THREADED PORTION
THREAD SERIES DESIGNATORUNS SINGLE THREADED PORTION
THREAD QUANTITY PER INCH14 SINGLE THREADED PORTION
UNDER FLANGE HEIGHT0.562 INCHES NOMINAL


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