Product Details | CHECK VALVE

4820-00-266-9519 A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

Part Alternates: N874270, N8742-70, DD4904, MILV17547, MIL-V-17547 TYPEA CLASS 1, MILV17547TYPEACLASS1, 1281N 2 1-2IN, 1281N212, 1281N-212 , 1281N212IN, 4820-00-266-9519, 00-266-9519, 4820002669519, 002669519

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 01 JAN 1963 00-266-9519

Drawings & Photos | NSN 4820-00-266-9519


Demand History | NSN 4820-00-266-9519

Part Number Request Date QTY Origin
1281N-212 2025-10-276 20 DIBBS
1281N-212 2025-09-265 20 DIBBS
1281N-212 2025-06-181 10 DIBBS
1281N-212 2025-06-170 10 DIBBS
1281N-212 2025-06-160 10 DIBBS
1281N-212 2025-05-147 10 DIBBS
1281N-212 2024-05-134 10 DIBBS
1281N-212 2024-05-123 10 DIBBS
1281N-212 2023-02-33 8 DIBBS
1281N-212 2022-10-300 4 DIBBS
1281N-212 2021-12-339 1 DIBBS
1281N-212 2021-09-271 1 DIBBS
1281N-212 2021-08-243 1 DIBBS
1281N-212 2021-08-227 3 DIBBS
1281N-212 2021-03-87 1 DIBBS
4820-00-266-9519 2015-10-287 15 DIBBS
4820-00-266-9519 2015-01-29 16 DIBBS
4820-00-266-9519 2014-04-98 13 DIBBS
4820-00-266-9519 2013-11-332 8 DIBBS
4820-00-266-9519 2013-02-32 8 DIBBS
4820-00-266-9519 2012-06-181 2 DIBBS
4820-00-266-9519 2012-06-167 2 DIBBS
4820-00-266-9519 2012-05-150 1 Pakistan
4820-00-266-9519 2009-02-41 8 DIBBS

Cross Reference | NSN 4820-00-266-9519

Part Number Cage Code Manufacturer
1281N 2 1-2IN 76364 MILWAUKEE VALVE COMPANY, INC. DBA HAMMOND
1281N-212 76364 MILWAUKEE VALVE COMPANY, INC. DBA HAMMOND
DD4904 95321 CLOW CORP MARINE VALVE PRODUCTS DIV
MIL-V-17547 TYPEA CLASS 1 81349 MILITARY SPECIFICATIONS PROMULGATED BY MILITARY
MILV17547 81349 MILITARY SPECIFICATIONS PROMULGATED BY MILITARY
N8742-70 63686 THE WALWORTH COMPANY

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Technical Data | NSN 4820-00-266-9519

Characteristic Specifications
MATERIAL COPPER ALLOY BODY NICKEL ALLOY FLOW CONTROL DEVICE NICKEL ALLOY SEAT
STYLE DESIGNATOR A2A STRAIGHT THRU FLANGED ENDS
VALVE SIZE 2.500 INCHES
FACE TO FACE DISTANCE 8.312 INCHES
FLOW CONTROL DEVICE DISK
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE FLANGE 1ST END
FLANGE SHAPE ROUND WITH HOLES 1ST END
NOMINAL OUTSIDE DIAMETER 6.125 INCHES 1ST END
NOMINAL THICKNESS 0.500 INCHES 1ST END
BOLT HOLE QUANTITY 6 1ST END
BOLT HOLE NOMINAL DIAMETER 0.562 INCHES 1ST END
BOLT CIRCLE NOMINAL DIAMETER 5.000 INCHES 1ST END
FLANGE FACE DESIGN PLAIN 1ST END
MOUNTING POSITION HORIZONTAL OR VERTICAL
FURNISHED ITEMS AND QUANTITY 1 LEVER
NONDEFINITIVE SPEC/STD DATA A TYPE AND 1 CLASS
MANUFACTURERS CODE 81349
DEFINITIVE GOVERNMENT SPEC/STD REFERENCE MIL-V-17547 TYPEA CLASS 1
MANUFACTURERS CODE 81349
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE MILV17547

Restrictions/Controls & Freight Information | NSN 4820-00-266-9519

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:UPrecious metal type is unknown
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 4820-00-266-9519

Category Code Description
Cognizance Codes3BNavy-owned stocks of field level repairable DLA material
Naval Inventory Control Point, Mechanicsburg
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
ReparabilityDField Level Reparables
Acquisition Advice CodesZINSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each