Model: 4B18-6-81

Sleeve Bearing

Properties:

Overall Length
Between 0.2590 inches and 0.2740 inches
Body Outside Diameter
Between 0.4980 inches and 0.5000 inches
Body Inside Diameter
Between 0.3340 inches and 0.3540 inches
Flange Outside Diameter
Between 0.6150 inches and 0.6350 inches
Flange Width
0.0630 inches
Corner Shape
Square all corners
Surface Finish
125.0 microinches left end surface of body and flange
Surface Finish
250.0 microinches inside diameter surface of body
Surface Finish
250.0 microinches outside diameter surface of body
Surface Finish
250.0 microinches outside diameter surface of flange
Surface Finish
250.0 microinches right end surface of body
Surface Finish
250.0 microinches right end surface of left flange
Material
Copper alloy
Surface Treatment
Cadmium
Style Designator
22c solid, external flange one end
Style Designator
Solid, external flange one end
NSN
3120-00-288-4928
Part Number
4B18-6-81
Description
Bearing,sleeve
CAGE
43999

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 4B18-6-81 NSN 3120-00-288-4928

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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
114870
UFC:
58890
LTL:
77.5
LCL:
RATING VARIABLE
WCC:
742
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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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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