4820-01-050-2176, SEAT,VALVE

National Stock Number:
4820-01-050-2176

Federal Supply Class:
4820

National Item Identification Number:
010502176

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:

30001

16780

EATON AEROSPACE LLC

Techincal Specification:

BODY OUTSIDE DIAMETER	0.635 INCHES MINIMUM AND 0.638 INCHES MAXIMUM
BODY STEPPED INSIDE DIAMETER	0.395 INCHES MINIMUM AND 0.405 INCHES MAXIMUM FIRST STEP
BODY STEPPED INSIDE DIAMETER	0.375 INCHES NOMINAL SECOND STEP
CRITICALITY CODE JUSTIFICATION	ABKK
FLANGE DIAMETER	0.7490 INCHES MINIMUM AND 0.7495 INCHES MAXIMUM
HARDNESS RATING	43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM OVERALL
OVERALL HEIGHT	0.625 INCHES MINIMUM AND 0.626 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OR AMS5630 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5623 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 440C OR STEEL COMP 440F OVERALL
SEATING SURFACE SHAPE	FLAT

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