6640-00-008-7991 BURNER,GAS,LABORATORY Index 2810-00-008-7993 MASTER ROD

National Stock Number:
4820-00-008-7992

Federal Supply Class:
4820

National Item Identification Number:
000087992

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:
113651P2000198PRATT & WHITNEY CANADA CORP


Techincal Specification:
BODY INSIDE DIAMETER2.490 INCHES MINIMUM AND 2.510 INCHES MAXIMUM
BODY OUTSIDE DIAMETER3.089 INCHES MINIMUM AND 3.090 INCHES MAXIMUM
CRITICALITY CODE JUSTIFICATIONADAR
FSC APPLICATION DATAACFT ENG R2000
HARDNESS RATING90.0 ROCKWELL B MINIMUM AND 105.0 ROCKWELL B MAXIMUM BODY
OVERALL HEIGHT0.462 INCHES MINIMUM AND 0.464 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5700 ASSN STD SINGLE MATERIAL RESPONSE BODY
MATERIALSTEEL BODY
SEAL ACCOMMODATION TYPEGROOVED
SEAT ANGLE IN DEG45.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
STYLE DESIGNATORPLAIN
TAPER MAJOR DIAMETER2.973 INCHES MINIMUM AND 2.983 INCHES MAXIMUM
TAPER MINOR DIAMETER2.703 INCHES MINIMUM AND 2.713 INCHES MAXIMUM
TAPER LENGTH0.368 INCHES MINIMUM AND 0.396 INCHES MAXIMUM


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