Product Details | VALVE SEAT

4820-00-987-7452 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: PL501E458AEPC5, 101B354AA1, 4820-00-987-7452, 00-987-7452, 4820009877452, 009877452

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 01 JAN 1962 00-987-7452

Drawings & Photos | NSN 4820-00-987-7452


Cross Reference | NSN 4820-00-987-7452

Part Number Cage Code Manufacturer
101B354AA1 03502 GENERAL ELECTRIC CO NAVAL AND DRIVE TURBINE SYSTEMS DEPT
101B354AA1 24446 GENERAL ELECTRIC CO
PL501E458AEPC5 24446 GENERAL ELECTRIC CO

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Technical Data | NSN 4820-00-987-7452

Characteristic Specifications
STYLE DESIGNATOR B7A PLAIN FLANGED
FLANGE DIAMETER 2.5005 INCHES MINIMUM AND 2.5010 INCHES MAXIMUM
BODY OUTSIDE DIAMETER 1.999 INCHES MINIMUM AND 2.000 INCHES MAXIMUM
FLANGE SEAT TO DISK END HEIGHT 0.498 INCHES MINIMUM AND 0.502 INCHES MAXIMUM
UNDER FLANGE HEIGHT 1.000 INCHES NOMINAL
BODY STEPPED INSIDE DIAMETER 0.844 INCHES NOMINAL FIRST STEP 1.089 INCHES NOMINAL SECOND STEP 1.500 INCHES NOMINAL THIRD STEP
MATERIAL STEEL BODY STEEL SEAT
MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-853,CL 3,TY E MIL SPEC SINGLE MATERIAL RESPONSE BODY STELLITE B21B23 MFR REF SINGLE MATERIAL RESPONSE SEAT
HARDNESS RATING NOT RATED
SEATING SURFACE SHAPE RADIAL
SEAT RADIUS 0.250 INCHES MINIMUM AND 0.256 INCHES MAXIMUM
III FSC APPLICATION DATA TURBINE,STEAM
MANUFACTURERS CODE 03502
DESIGN CONTROL REFERENCE 101B354AA1

Restrictions/Controls & Freight Information | NSN 4820-00-987-7452

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 594 unknown
Originating Activity Code XX
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity V Vehicles, machinery, shop and warehouse equipment and supplies, including special tools and equipment, ground servicing and special purpose vehicles, marine equipment and supplies, repair and maintenance parts for the above.
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 4820-00-987-7452

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 CodesJNOT STOCKED, CENTRALLY PROCURED # (NON-STOCKED ITEMS) IMM/Service centrally managed but not stocked item. Procurement will be initiated only after receipt of a requisition.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each