4820-00-771-8890, SEAT,VALVE

National Stock Number:
4820-00-771-8890

Federal Supply Class:
4820

National Item Identification Number:
007718890

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:

1602973-1

99251

MISSION SYSTEMS DAVENPORT INC.

Techincal Specification:

STYLE DESIGNATOR	PLAIN FLANGED
FLANGE DIAMETER	0.687 INCHES NOMINAL
BODY OUTSIDE DIAMETER	0.265 INCHES NOMINAL
FLANGE SEAT TO DISK END HEIGHT	0.625 INCHES NOMINAL
UNDER FLANGE HEIGHT	0.057 INCHES NOMINAL
BODY STEPPED INSIDE DIAMETER	0.234 INCHES NOMINAL FIRST STEP
	0.281 INCHES NOMINAL SECOND STEP
	0.438 INCHES NOMINAL THIRD STEP
	0.625 INCHES NOMINAL FOURTH STEP
MATERIAL	ALUMINUM ALLOY 2024 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-A-268,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	ANODIZE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SEATING SURFACE SHAPE	FLAT
THE MANUFACTURERS DATA
MANUFACTURERS CODE	99251
DESIGN CONTROL REFERENCE	1602973-1

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