Product Details | VALVE SEAT

4820-01-204-8418 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.20248100015Valves, Powered48200018Valves, Nonpowered

Part Alternates: 1889553, 1889553 PIECE 31, 1889553PIECE31, 2620922X2, 2620-922X2, 2620-922X2 ASSEMBLY GS PIECE 31, 2620922X2ASSEMBLYGSPIECE31, 787494, 7874-94, 4820-01-204-8418, 01-204-8418, 4820012048418, 012048418

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 30 MAR 1985 01-204-8418

Drawings & Photos | NSN 4820-01-204-8418


Cross Reference | NSN 4820-01-204-8418

Part Number Cage Code Manufacturer
1889553 80064 NAVAL SHIP SYSTEMS COMMAND
1889553 PIECE 31 80064 NAVAL SHIP SYSTEMS COMMAND
2620-922X2 96169 ELECTRIC BOAT CORPORATION
2620-922X2 ASSEMBLY GS PIECE 31 96169 ELECTRIC BOAT CORPORATION
7874-94 96169 ELECTRIC BOAT CORPORATION

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Technical Data | NSN 4820-01-204-8418

Characteristic Specifications
STYLE DESIGNATOR B1 THREADED FLANGED
FLANGE DIAMETER 3.187 INCHES NOMINAL
BODY INSIDE DIAMETER 2.500 INCHES NOMINAL
FLANGE SEAT TO DISK END HEIGHT 0.187 INCHES NOMINAL
UNDER FLANGE HEIGHT 0.531 INCHES NOMINAL
MATERIAL NICKEL ALLOY SEAT
HARDNESS RATING NOT RATED
SEATING SURFACE SHAPE ANGULAR
SEAT ANGLE IN DEG 45.000 NOMINAL

Restrictions/Controls & Freight Information | NSN 4820-01-204-8418

Category Code Description
Shelf-Life Code:0Nondeteriorative
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:UUNCLASSIFIED
Precious Metals Indicator Code:AItem does not contain precious metal
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
NMF Description 051080 FAUCETS,BIBCOCKS,GATES VALVES
Less than car load rating
Less than truck load rating W Rating Variable
Water commodity Code 576 unknown
Originating Activity Code AX Defense Supply Center Columbus
Columbus, OH 43216-5000
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity B Construction materials: Includes paint and related materials, prefabricated building, wood products, metal and composition materials and their products, commercial hardware and miscellaneous items, cement, asphalt, building maintenance materials.
Air Special Handling Z No special handling required.
Special Handling Code 9 unknonwn
HAZMAT
Type of Cargo Z No special type of cargo code applicable

Management | NSN 4820-01-204-8418

Category Code Description
Cognizance Codes9BNavy-owned stocks of DLA material
Naval Inventory Control Point, Mechanicsburg
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
Acquisition Advice CodesVTERMINAL ITEM # Identifies items in stock, but future procurement is not authorized. Requisitions may continue to be submitted until stocks are exhausted. Preferred item National Stock Number is normally provided by application of the phrase: When Exhausted Use (NSN). Requisitions will be submitted in accordance with IMM/Service requisitioning procedures as applicable.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each