4820-01-158-1886 DISK,VALVE Index 5340-01-158-1889 SEAT,HELICAL COMPRESSION SPRING

National Stock Number:
5340-01-158-1888

Federal Supply Class:
5340

National Item Identification Number:
011581888

Description:
SEAT,HELICAL COMPRESSION SPRING

Detail:
A circular item, usually having a flat or grooved flange, boss(es), and/or counterbore designed to accommodate the end of the spring. It is used to position the spring, but does not encase the spring or restrain lateral motion. It may be used in conjunction with a RETAINER, HELICAL COMPRESSION SPRING. Excludes WASHER (1), (as modified); SEAT, BALL SOCKET and HOLDER, SPRING. See also ROTOR, ENGINE POPPET VALVE.


Manufacturer Information:
10112815A486GNIMIKKEISTOKESKUS NCB FINLAND
3003189-293835PARKER-HANNIFIN CORP


Techincal Specification:
DISTANCE FROM END TO FIRST STEP0.2850 INCHES NOMINAL
END DIAMETER0.4190 INCHES NOMINAL
BORE DIAMETER0.2500 INCHES MINIMUM AND 0.2600 INCHES MAXIMUM
CHAMFER ANGLE IN DEG15.0
COUNTERBORE DIAMETER0.4700 INCHES NOMINAL
COUNTERSINK ANGLE IN DEG45.0
COUNTERSINK DIAMETER0.3120 INCHES NOMINAL
COUNTERBORE LENGTH0.0490 INCHES MINIMUM AND 0.0510 INCHES MAXIMUM
DESIGN TYPESOLID
FIRST STEP DIAMETER0.7100 INCHES MINIMUM AND 0.7200 INCHES MAXIMUM
OVERALL HEIGHT0.3740 INCHES MINIMUM AND 0.3760 INCHES MAXIMUM
MATERIAL HARDNESS RATING49.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
MATERIALSTEEL
SPECIAL FEATURESNOT CASEHARDENED;MATL-STEEL QQ-S-763,CL 420
STYLE DESIGNATORSEAT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONPS13001, MCDONNELL DOUGLAS CORP MFR REF SINGLE TREATMENT RESPONSE
SURFACE TREATMENTPASSIVATE


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