Product Details | VALVE SEAT

4820-00-255-5804 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: M11608IM6, M11608ITEM6, 4820-00-255-5804, 00-255-5804, 4820002555804, 002555804

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 12 MAR 1971 00-255-5804

Drawings & Photos | NSN 4820-00-255-5804


Cross Reference | NSN 4820-00-255-5804

Part Number Cage Code Manufacturer
M11608IM6 K2980 SHIPHAM VALVES A DIVISION OF HAMWORTH VALVES LTD
M11608ITEM6 K2980 SHIPHAM VALVES A DIVISION OF HAMWORTH VALVES LTD

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Technical Data | NSN 4820-00-255-5804

Characteristic Specifications
STYLE DESIGNATOR B1 THREADED FLANGED
FLANGE DIAMETER 2.688 INCHES NOMINAL
FLANGE SEAT TO DISK END HEIGHT 0.438 INCHES NOMINAL
UNDER FLANGE HEIGHT 0.500 INCHES NOMINAL
BODY STEPPED INSIDE DIAMETER 2.000 INCHES NOMINAL FIRST STEP 2.375 INCHES NOMINAL SECOND STEP
MATERIAL NICKEL ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION MONEL BS3071NA13 MFR REF SINGLE MATERIAL RESPONSE OVERALL
SEATING SURFACE SHAPE ANGULAR
SEAT ANGLE IN DEG 20.000 NOMINAL
THREAD SERIES DESIGNATOR UN SINGLE THREADED PORTION
NOMINAL THREAD SIZE 2.375 INCHES SINGLE THREADED PORTION
THREAD QUANTITY PER INCH 16 SINGLE THREADED PORTION
THREAD CLASS 2A SINGLE THREADED PORTION
THREAD LENGTH 0.500 INCHES NOMINAL SINGLE THREADED PORTION
MANUFACTURERS CODE K2980
DESIGN CONTROL REFERENCE M11608ITEM6

Restrictions/Controls & Freight Information | NSN 4820-00-255-5804

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.
Automatic Data Processing Equipment:0Represents items with no ADP components. NOTE: Codes 1 through 6 are only to be used when the item is Automatic Data Processing Equipment (ADPE) in its entirety and is limited to the type meeting only one of the definitions for codes 1 through 6. (See code 9)
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 HD Naval Inventory Control Point
Mechanicsburg, PA 17055-0788
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 4820-00-255-5804

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 CodesXSEMIACTIVE ITEM-NO REPLACEMENT (NON-STOCKED ITEMS) A potentially inactive NSN which must be retained in the supply system as an item of supply because (1) stocks of the item are on hand or in use below the wholesale level and (2) the NSN is cited in equipment authorization documents TO & E, TA, TM, etc., or in-use assets are being reported. 1. Items are authorized for central procurement but not authorized for stockage at wholesale level. 2. Requisitions for in-use replacement will be authorized in accordance with individual Military Service directives. 3. Requisitions may be submitted as requirements generate. Repetitive demands may dictate an AAC change to permit wholesale stockage.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
Z
EA : Each