4820-01-173-4164 SEAT,VALVE Index 4820-01-173-4166 SEAT,VALVE

National Stock Number:
4820-01-173-4165

Federal Supply Class:
4820

National Item Identification Number:
011734165

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:
34955378TRAC REGULATOR CO., INC.
349-0055378TRAC REGULATOR CO., INC.


Techincal Specification:
BODY STEPPED INSIDE DIAMETER0.750 INCHES NOMINAL SECOND STEP
BODY STEPPED INSIDE DIAMETER0.755 INCHES NOMINAL FIRST STEP
CRITICALITY CODE JUSTIFICATIONFEAT
FLANGE DIAMETER1.250 INCHES NOMINAL
FLANGE SEAT TO DISK END HEIGHT0.375 INCHES NOMINAL
MATERIALSTEEL COMP 303 OVERALL
NOMINAL THREAD SIZE1.125 INCHES SINGLE THREADED PORTION
SEATING SURFACE SHAPEFLAT
SPECIAL FEATURESWEAPON SYSTEM ESSENTIAL
STYLE DESIGNATORTHREADED FLANGED
THREAD CLASS2A SINGLE THREADED PORTION
THREAD LENGTH0.360 INCHES NOMINAL SINGLE THREADED PORTION
THREAD QUANTITY PER INCH20 SINGLE THREADED PORTION
THREAD SERIES DESIGNATORUN SINGLE THREADED PORTION
UNDER FLANGE HEIGHT1.813 INCHES NOMINAL


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