Product Details | VALVE SEAT

4820-01-137-8227 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: 2350823, 2350-823, 2350-823 PC 10, 2350823PC10, 4325672, 4325672 PC 10, 4325672PC10, 509-4325672 PC, 509-4325672 PC 10, 5094325672PC, 5094325672PC10, 4820-01-137-8227, 01-137-8227, 4820011378227, 011378227

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 02 SEP 1982 01-137-8227

Drawings & Photos | NSN 4820-01-137-8227


Demand History | NSN 4820-01-137-8227

Part Number Request Date QTY Origin
4820-01-137-8227 2025-11-317 13 DIBBS
4820-01-137-8227 2025-04-114 13 DIBBS
4820-01-137-8227 2023-12-344 12 DIBBS
4820-01-137-8227 2022-04-101 6 DIBBS
4820-01-137-8227 2022-03-90 6 DIBBS
4820-01-137-8227 2020-05-142 15 DIBBS
4820-01-137-8227 2019-01-10 20 DIBBS
4820-01-137-8227 2018-09-263 21 DIBBS
4820-01-137-8227 2018-08-227 21 DIBBS
4820-01-137-8227 2015-02-36 17 DIBBS
4820-01-137-8227 2015-01-25 17 DIBBS
4820-01-137-8227 2013-02-32 15 DIBBS
4820-01-137-8227 2012-12-354 11 DIBBS
4820-01-137-8227 2011-03-61 2 DIBBS
4820-01-137-8227 2011-01-25 7 DIBBS
4820-01-137-8227 2010-04-119 3 DIBBS

Cross Reference | NSN 4820-01-137-8227

Part Number Cage Code Manufacturer
2350-823 43689 HUNTINGTON INGALLS INCORPORATED DIV NEWPORT NEWS
2350-823 PC 10 09032 TATE ANDALE, INC.
2350-823 PC 10 43689 HUNTINGTON INGALLS INCORPORATED DIV NEWPORT NEWS
4325672 80064 NAVAL SHIP SYSTEMS COMMAND
4325672 PC 10 80064 NAVAL SHIP SYSTEMS COMMAND
509-4325672 PC 80064 NAVAL SHIP SYSTEMS COMMAND
509-4325672 PC 10 43689 HUNTINGTON INGALLS INCORPORATED DIV NEWPORT NEWS

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Technical Data | NSN 4820-01-137-8227

Characteristic Specifications
STYLE DESIGNATOR B6A PLAIN
OVERALL HEIGHT 0.625 INCHES NOMINAL
BODY OUTSIDE DIAMETER 6.625 INCHES NOMINAL
BODY STEPPED INSIDE DIAMETER 5.125 INCHES MINIMUM AND 6.000 INCHES MAXIMUM FIRST STEP
MATERIAL NICKEL ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION QQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
HARDNESS RATING NOT RATED
SEATING SURFACE SHAPE ANGULAR
SEAT ANGLE IN DEG 45.000 NOMINAL
THREAD SERIES DESIGNATOR UNS SINGLE THREADED PORTION
NOMINAL THREAD SIZE 6.625 INCHES SINGLE THREADED PORTION
THREAD QUANTITY PER INCH 12 SINGLE THREADED PORTION
THREAD CLASS 3A SINGLE THREADED PORTION
THREAD LENGTH 0.500 INCHES NOMINAL SINGLE THREADED PORTION
SPECIAL FEATURES TWO SLOTS FOR SCREWING SEAT INTO PLACE

Restrictions/Controls & Freight Information | NSN 4820-01-137-8227

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 4820-01-137-8227

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 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