NSN 4820-00-403-5989

Part Details | VALVE SEAT

4820-00-403-5989 A replaceable item designed to provide a 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.

Alternate Parts: 2640671X2PC62 12IN, 2640-671X2PC6-2 1-2IN, SS8452180979PC62 12INQ3, SS845-2180979PC6-2 1-2INQ3, 2640671X3PC7Q3, 2640-671X3PC7Q3, 2640671X2PC6QA, 2640-671X2PC6QA, 2640671X2PC62 12INQ3, 2640-671X2PC6-2 1-2INQ3, SS8452180979PC62 12IN, SS845-2180979PC6-2 1-2IN, 4820-00-403-5989, 00-403-5989, 4820004035989, 004035989

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
48JUL 08, 197000-403-598922113 ( SEAT, VALVE )
REFERENCE DRAWINGS & PICTURES

THREADED FLANGED

Cross Reference | NSN 4820-00-403-5989
Part Number Cage Code Manufacturer
2640-671X2PC6-2 1-2IN96169ELECTRIC BOAT CORPORATION
SS845-2180979PC6-2 1-2INQ303950NAVAL INVENTORY CONTROL POINTMECHANICSBURG
2640-671X3PC7Q303950NAVAL INVENTORY CONTROL POINTMECHANICSBURG
2640-671X2PC6QA03950NAVAL INVENTORY CONTROL POINTMECHANICSBURG
2640-671X2PC6-2 1-2INQ303950NAVAL INVENTORY CONTROL POINTMECHANICSBURG
SS845-2180979PC6-2 1-2IN80064NAVAL SHIP SYSTEMS COMMAND
Technical Data | NSN 4820-00-403-5989
Characteristic Specifications
STYLE DESIGNATOR1 THREADED FLANGED
OVERALL HEIGHT0.625 INCHES NOMINAL
BODY OUTSIDE DIAMETER3.621 INCHES MINIMUM AND 3.623 INCHES MAXIMUM
BODY INSIDE DIAMETER2.125 INCHES NOMINAL
SEATING SURFACE SHAPE RADIAL
SEAT RADIUS0.155 INCHES MINIMUM AND 0.157 INCHES MAXIMUM
SPECIAL TEST FEATURESQUALITY ASSURANCE TESTED FOR SUBMARINE SAFETY PROGRAM
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSITEMS THAT SUPPORT A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS
CRITICALITY CODE JUSTIFICATIONZZZY