2540-01-104-6769 BUMPER,VEHICULAR Index 6680-01-104-6771 GAGE ROD-CAP,LIQUID LEVEL

National Stock Number:
4820-01-104-6770

Federal Supply Class:
4820

National Item Identification Number:
011046770

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:
685937129953SPACE AGE ENGINEERING INC
685937163005ROLLS-ROYCE CORPORATION
685937173342ALLISON TRANSMISSION INC
685937198072PRECISION PIECE PARTS INC


Techincal Specification:
BODY OUTSIDE DIAMETER1.008 INCHES MINIMUM AND 1.012 INCHES MAXIMUM
BODY STEPPED INSIDE DIAMETER0.500 INCHES MINIMUM AND 0.505 INCHES MAXIMUM FIRST STEP
BODY STEPPED INSIDE DIAMETER0.920 INCHES NOMINAL SECOND STEP
BODY STEPPED INSIDE DIAMETER0.978 INCHES MINIMUM AND 0.983 INCHES MAXIMUM THIRD STEP
FLANGE DIAMETER1.122 INCHES MINIMUM AND 1.123 INCHES MAXIMUM
FLANGE SEAT TO DISK END HEIGHT0.259 INCHES NOMINAL
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL OVERALL
SEAT RADIUS0.030 INCHES MINIMUM AND 0.040 INCHES MAXIMUM
SEATING SURFACE SHAPERADIAL
STYLE DESIGNATORPLAIN FLANGED
UNDER FLANGE HEIGHT0.165 INCHES MINIMUM AND 0.170 INCHES MAXIMUM


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