8440-00-412-2312 BELT,TROUSERS Index 3120-00-412-2317 BEARING,SLEEVE

National Stock Number:
4820-00-412-2315

Federal Supply Class:
4820

National Item Identification Number:
004122315

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:
AGSS555-508-2101035PC00380064NAVAL SHIP SYSTEMS COMMAND
AGSS555-508-2101035PC00381316PORTSMOUTH NAVAL SHIPYARD
AGSS555-508-2101035PC003Q303950NAVAL INVENTORY CONTROL POINT MECHANICSBURG


Techincal Specification:
BODY INSIDE DIAMETER1.939 INCHES MINIMUM AND 1.941 INCHES MAXIMUM
BODY OUTSIDE DIAMETER2.283 INCHES MINIMUM AND 2.285 INCHES MAXIMUM
CRITICALITY CODE JUSTIFICATIONZZZY
FLANGE DIAMETER2.406 INCHES NOMINAL
FLANGE SEAT TO DISK END HEIGHT0.159 INCHES MINIMUM AND 0.161 INCHES MAXIMUM
HARDNESS RATING75.0 SHORE DUROMETER D NOMINAL BODY
HARDNESS RATING75.0 SHORE DUROMETER D NOMINAL FACE
MATERIAL DOCUMENT AND CLASSIFICATIONURETHANE ADIPRENE,L315 NAVY MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALPLASTIC OVERALL
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSITEM THAT SUPPORTS A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS
SEAT ANGLE IN DEG50.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
STYLE DESIGNATORPLAIN FLANGED
UNDER FLANGE HEIGHT0.152 INCHES MINIMUM AND 0.155 INCHES MAXIMUM


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