4820-01-268-3279 SEAT,VALVE Index 4820-01-268-3281 SEAT,VALVE

National Stock Number:
4820-01-268-3280

Federal Supply Class:
4820

National Item Identification Number:
012683280

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:
803-4384536-21B-1380064NAVAL SHIP SYSTEMS COMMAND
803-4384536-21B-8580064NAVAL SHIP SYSTEMS COMMAND


Techincal Specification:
FLANGE DIAMETER0.694 INCHES NOMINAL
BODY INSIDE DIAMETER0.205 INCHES NOMINAL
FLANGE SEAT TO DISK END HEIGHT0.091 INCHES NOMINAL
UNDER FLANGE HEIGHT0.555 INCHES NOMINAL
MATERIALNICKEL ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-288 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SEATING SURFACE SHAPEFLAT
THREAD SERIES DESIGNATORUNS SINGLE THREADED PORTION
THREAD CLASS3A SINGLE THREADED PORTION
SPECIAL FEATURESWEAPON SYSTEM ESSENTIAL
CRITICALITY CODE JUSTIFICATIONFEAT
THE MANUFACTURERS DATA
MANUFACTURERS CODE80064
DESIGN CONTROL REFERENCE803-4384536-21B-85


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