Model: 221

Wearing Ring

Properties:

Body Style
Plain
Overall Length
0.750 inches
Bolt Circle Diameter
4.625 inches
Body Outside Diameter
5.244 inches
Body Inside Diameter
Between 3.984 inches and 3.986 inches
Unthreaded Mounting Hole Diameter
0.281 inches
Bolt Hole Quantity
2
Corner Shape
Square all corners
Surface Finish
125.0 microinches inside
Surface Finish
125.0 microinches outside
Surface Finish
125.0 microinches left face
Surface Finish
125.0 microinches right face
Material
Copper alloy
Material Specification
Mil-b-16261, gr 3 military specification single material response
NSN
4320-00-212-9422
Part Number
221
Description
Ring,wearing
CAGE
16062

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.

Part 221 NSN 4320-00-212-9422

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
22534
FIIG:
A19900
Concept No.:
App. Key:
A
Cond. Code:
2
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 8413919520
  • SITC: 74291
  • End Use: Industrial engines
  • NAICS: 333911
  • USDA: 1

Freight Class: Parts, nesoi, of pumps for liquids

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