Product Details | VALVE SEAT

4820-01-186-4718 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: 68205563, 6820556-3, 4820-01-186-4718, 01-186-4718, 4820011864718, 011864718

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 10 AUG 1984 01-186-4718

Drawings & Photos | NSN 4820-01-186-4718


Demand History | NSN 4820-01-186-4718

Part Number Request Date QTY Origin
68205563 2015-12-362 10 Canada
68205563 2015-10-282 10 Canada

Cross Reference | NSN 4820-01-186-4718

Part Number Cage Code Manufacturer
6820556-3 63005 ROLLS-ROYCE CORPORATION
6820556-3 73342 ALLISON TRANSMISSION, INC.

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Technical Data | NSN 4820-01-186-4718

Characteristic Specifications
STYLE DESIGNATOR B6 PLAIN
OVERALL HEIGHT 0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM
BODY OUTSIDE DIAMETER 0.661 INCHES MINIMUM AND 0.662 INCHES MAXIMUM
BODY INSIDE DIAMETER 0.344 INCHES MINIMUM AND 0.346 INCHES MAXIMUM
MATERIAL COPPER ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION AMS4640 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HARDNESS RATING NOT RATED
SEATING SURFACE SHAPE RADIAL
SEAT RADIUS 0.218 INCHES NOMINAL
MANUFACTURERS CODE 63005
DESIGN CONTROL REFERENCE 6820556-3

Restrictions/Controls & Freight Information | NSN 4820-01-186-4718

Category Code Description
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.
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
No Freight Information