Model: 4B21S4-017
Sleeve BearingProperties:
A tubular shaped item with or without flange(s) designed to reduce friction and carry a kinetic load on the surface(s) parallel to the axis of the bore. it must have a visible or detectable means of lubrication or be self-lubricated. the over all length must exceed 25 percent of the outside diameter or the shortest distance between peripheral flats of the body, except for straight tubular (without flange or shoulder) items having a bearing surface(s) parallel to the axis of the bore only. includes items which are divided into two or more segments which include 180 degrees (3.141 radians) or less of the bearing periphery. see also bushing, sleeve; spacer, sleeve; and washer (as modified). excludes pin, hollow.
Part 4B21S4-017 NSN 3120-00-288-4998
Material Classification
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsFreight Classification
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Schedule B and Export
- Schedule B: 8482997090
- SITC: 74699
- End Use: Industrial machines, other
- NAICS: 332991
- USDA: 1
Freight Class: Parts, nesoi, for roller bearings or for combined ball/roller bearings, nesoi
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