4320-00-860-7978 RING,WEARING Index 4140-00-860-7980 BUSHING,SLEEVE

National Stock Number:
4320-00-860-7979

Federal Supply Class:
4320

National Item Identification Number:
008607979

Description:
RING,WEARING

Detail:
A cylindrical item with or without flange(s), designed to be inserted in a pump casing or secured to the impeller of a centrifugal pump. It is used for the purpose of providing a close running clearance between the impeller and casing in order to prevent or overcome leakage due to erosion. It may also be used as a diffuser ring in the suction and discharge throats of valves.


Manufacturer Information:
378D677H0190099NORTHROP GRUMMAN SYSTEMS CORPORATION
379 D 677-0190099NORTHROP GRUMMAN SYSTEMS CORPORATION
379D677H015N842METRICAN INC DBA METRIX MANUFACTURING COMPANY
379D68479500WESTINGHOUSE ELECTRIC CORP
379D684PC490099NORTHROP GRUMMAN SYSTEMS CORPORATION
379D677H0190099NORTHROP GRUMMAN SYSTEMS CORPORATION


Techincal Specification:
BODY INSIDE DIAMETER4.120 INCHES MINIMUM AND 4.121 INCHES MAXIMUM
BODY OUTSIDE DIAMETER5.372 INCHES MINIMUM AND 5.373 INCHES MAXIMUM
BODY STYLEEXTERNAL FLANGE
BOLT CIRCLE DIAMETER4.500 INCHES NOMINAL
BOLT HOLE QUANTITY4
CHAMFER ANGLE45.0 DEGREES NOMINAL OUTSIDE RIGHT CORNER
CHAMFER LENGTH0.062 INCHES NOMINAL OUTSIDE RIGHT CORNER
CORNER SHAPECHAMFERED OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
END TO FLANGE DISTANCE0.375 INCHES NOMINAL
FLANGE DIAMETER6.875 INCHES NOMINAL
GROOVE DEPTH0.500 INCHES NOMINAL
GROOVE QUANTITY3
HOLE DEPTH0.094 INCHES NOMINAL
LEFT SIDE FLANGE THICKNESS0.250 INCHES NOMINAL
OVERALL LENGTH0.625 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-16261 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIALCOPPER ALLOY
SPECIAL FEATURESMTG HOLES COUNTERBORED
UNTHREADED MOUNTING HOLE DIAMETER0.125 INCHES NOMINAL


Click here to Register for Free 30-day Trial

© 2026 NSN-Now. All rights reserved.    Privacy Policy  |  Contact Us