2915-00-975-7127 PLUNGER,FUEL SYSTEM Index 1650-00-975-7129 RING SET,PISTON

National Stock Number:
4820-00-975-7128

Federal Supply Class:
4820

National Item Identification Number:
009757128

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:
4257681873WOODWARD HRT INC
975-712859155MARINE DIESEL, INC.
975712859155MARINE DIESEL, INC.


Techincal Specification:
BODY OUTSIDE DIAMETER0.248 INCHES MINIMUM AND 0.252 INCHES MAXIMUM
BODY STEPPED INSIDE DIAMETER0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM FIRST STEP
BODY STEPPED INSIDE DIAMETER0.250 INCHES NOMINAL SECOND STEP
FLANGE DIAMETER0.434 INCHES MINIMUM AND 0.436 INCHES MAXIMUM
FLANGE SEAT TO DISK END HEIGHT0.095 INCHES MINIMUM AND 0.105 INCHES MAXIMUM
HARDNESS RATING58.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL
OVERALL HEIGHT0.250 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,CLASS 440C FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL CORROSION RESISTING OVERALL
SEAT ANGLE IN DEG90.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
UNDER FLANGE HEIGHT0.145 INCHES MINIMUM AND 0.155 INCHES MAXIMUM
STYLE DESIGNATORPLAIN
SURFACE TREATMENTPASSIVATE OVERALL


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