Model: 4B21B4-018

Sleeve Bushing

Properties:

Overall Length
Between 0.5575 inches and 0.5625 inches
Body Outside Diameter
Between 0.3730 inches and 0.3735 inches
Body Inside Diameter
Between 0.2495 inches and 0.2505 inches
Corner Shape
Square all corners
Material
Copper alloy 642
Material Specification
Ams 4631 assn standard single material response
Style Designator
17c solid, plain, no outside flanges
NSN
3120-00-818-0136
Part Number
4B21B4-018
Description
Bushing,sleeve
CAGE
43999

A tubular shaped unthreaded item with or without a flange at one end designed to be inserted into a hole to reduce the inside diameter of the hole and to protect the surrounding body structure from damage resulting from stress, strain, and/or vibration. The overall length must exceed 25 percent of the outside diameter or the shortest distance between peripheral flats of the body. Includes items which are divided into two or more segments which includes 180 degrees (3.141 radians) or less of the bearing periphery. For items made of rubber, see bushing, nonmetallic. See also bearing, sleeve; bushing, tapered; spacer, sleeve; insulator, bushing; and bushing, electrical conductor. Excludes bushing, drill, jig.

Part 4B21B4-018 NSN 3120-00-818-0136

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
13206
FIIG:
A045A0
Concept No.:
App. Key:
K
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:
F

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

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

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Schedule B and Export
  • Schedule B: 8482997060
  • SITC: 74699
  • End Use: Industrial machines, other
  • NAICS: 332991
  • USDA: 1

Freight Class: Parts, nesoi, for cylindrical roller bearings, nesoi

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