Product Details | VALVE SEAT

4820-01-104-6770 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: 6859371, 4820-01-104-6770, 01-104-6770, 4820011046770, 011046770

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 09 DEC 1980 01-104-6770

Drawings & Photos | NSN 4820-01-104-6770


Demand History | NSN 4820-01-104-6770

Part Number Request Date QTY Origin
4820-01-104-6770 2015-12-341 45 DIBBS
4820-01-104-6770 2012-08-244 55 DIBBS
4820-01-104-6770 2011-05-126 45 DIBBS
4820-01-104-6770 2010-10-289 5 Indonesia
4820-01-104-6770 2010-03-69 9 Indonesia

Cross Reference | NSN 4820-01-104-6770

Part Number Cage Code Manufacturer
6859371 29953 SPACE AGE ENGINEERING INC
6859371 63005 ROLLS-ROYCE CORPORATION
6859371 73342 ALLISON TRANSMISSION, INC.
6859371 98072 PRECISION PIECE PARTS INC

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Technical Data | NSN 4820-01-104-6770

Characteristic Specifications
STYLE DESIGNATOR B7A PLAIN FLANGED
FLANGE DIAMETER 1.122 INCHES MINIMUM AND 1.123 INCHES MAXIMUM
BODY OUTSIDE DIAMETER 1.008 INCHES MINIMUM AND 1.012 INCHES MAXIMUM
FLANGE SEAT TO DISK END HEIGHT 0.259 INCHES NOMINAL
UNDER FLANGE HEIGHT 0.165 INCHES MINIMUM AND 0.170 INCHES MAXIMUM
BODY STEPPED INSIDE DIAMETER 0.500 INCHES MINIMUM AND 0.505 INCHES MAXIMUM FIRST STEP 0.920 INCHES NOMINAL SECOND STEP 0.978 INCHES MINIMUM AND 0.983 INCHES MAXIMUM THIRD STEP
MATERIAL STEEL OVERALL
HARDNESS RATING 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL
SEATING SURFACE SHAPE RADIAL
SEAT RADIUS 0.030 INCHES MINIMUM AND 0.040 INCHES MAXIMUM
III END ITEM IDENTIFICATION T-56 ENGINE

Restrictions/Controls & Freight Information | NSN 4820-01-104-6770

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 ZA Australia
ZB
ZC
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 4820-01-104-6770

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 CodesDDoD INTEGRATED MATERIEL-MANAGED, STOCKED, AND ISSUED # Issue, transfer, or shipment is not subject to specialized controls other than those imposed by the Integrated Materiel Manager/Service supply policy. 1. The item is centrally managed, stocked, and issued. 2. Requisitions must contain the fund citation required to acquire the item. Requisitions will be submitted in accordance with Integrated Materiel Manager(IMM)/Service requisitioning procedures.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each