Model: BB21721

Sleeve Bearing

Properties:

Hole Diameter
0.5000 inches first
Overall Length
4.1250 inches
Body Outside Diameter
Between 3.7530 inches and 3.7560 inches
Body Inside Diameter
Between 3.2570 inches and 3.2600 inches
Lubricant Accommodation Style
Grooved closed both ends
Corner Shape
Square all corners
Antirotation/lubrication Type And Quantity
2 hole
Surface Groove Location And Quantity
2 internal
Material
Copper alloy 937
Material Specification
Sae assn standard single material response
Style Designator
17c solid, plain, no outside flanges
Style Designator
Solid, plain, no outside flanges
NSN
3120-00-706-3734
Part Number
BB21721
Description
Bearing,sleeve
CAGE
56442

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 BB21721 NSN 3120-00-706-3734

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
13205
FIIG:
A045A0
Concept No.:
App. Key:
D
Cond. Code:
1
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: 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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