4820-01-085-7071 SEAT,VALVE Index 5985-01-085-7073 SWITCH,RADIO FREQUENCY TRANSMISS

National Stock Number:
4820-01-085-7072

Federal Supply Class:
4820

National Item Identification Number:
010857072

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:
MC1254176050EATON AEROSPACE LLC M C AEROSPACE DIV DBA STERER ENGINEERING


Techincal Specification:
BODY OUTSIDE DIAMETER0.436 INCHES MINIMUM AND 0.438 INCHES MAXIMUM
BODY STEPPED INSIDE DIAMETER0.312 INCHES MINIMUM SECOND STEP AND 0.313 INCHES MAXIMUM SECOND STEP
BODY STEPPED INSIDE DIAMETER0.303 INCHES MINIMUM FIRST STEP AND 0.313 INCHES MAXIMUM FIRST STEP
FLANGE DIAMETER0.549 INCHES MINIMUM AND 0.550 INCHES MAXIMUM
FLANGE SEAT TO DISK END HEIGHT0.351 INCHES NOMINAL
HARDNESS RATING84.0 ROCKWELL SUPERFICIAL 15-N NOMINAL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 303PB OVERALL OR STEEL COMP 416 OVERALL
PROPRIETARY CHARACTERISTICSPACS
SEATING SURFACE SHAPEFLAT
STYLE DESIGNATORPLAIN FLANGED
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMC+5 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
UNDER FLANGE HEIGHT0.094 INCHES MINIMUM AND 0.104 INCHES MAXIMUM


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