4140-01-256-9871 IMPELLER,FAN,CENTRIFUGAL Index 4320-01-256-9874 PUMP,CENTRIFUGAL

National Stock Number:
4820-01-256-9873

Federal Supply Class:
4820

National Item Identification Number:
012569873

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:
803-4384536-4XXX-13(SPCLN)80064NAVAL SHIP SYSTEMS COMMAND


Techincal Specification:
BODY INSIDE DIAMETER1.105 INCHES MINIMUM AND 1.113 INCHES MAXIMUM
CRITICALITY CODE JUSTIFICATIONZZZY
FLANGE DIAMETER1.104 INCHES MINIMUM AND 1.114 INCHES MAXIMUM
FLANGE SEAT TO DISK END HEIGHT0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALNICKEL ALLOY OVERALL
NOMINAL THREAD SIZE1.188 INCHES SINGLE THREADED PORTION
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
SEAL ACCOMMODATION TYPEGROOVED
SEAT ANGLE IN DEG45.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
SPECIAL FEATURESINSPECTION PER MIL-I-45208; SHIPMENT AND STORAGE PER MIL-STD-129; CLEAN PER MIL-STD-767
UNDER FLANGE HEIGHT0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM
STYLE DESIGNATORTHREADED FLANGED
THREAD CLASS3A SINGLE THREADED PORTION
THREAD LENGTH0.172 INCHES NOMINAL SINGLE THREADED PORTION
THREAD SERIES DESIGNATORUN SINGLE THREADED PORTION
THREAD QUANTITY PER INCH20 SINGLE THREADED PORTION


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