Model: 3866R18

Access Cover

Special Features:

Three chucking lugs equallyspaced between ears and one undercut in the circular recesscentrally located between two of the chucking lugs

Properties:

Cross Sectional Shape
Circular recess
Inside Diameter
3.125 inches
Hole Diameter
0.594 inches
Pilot Diameter
Between 3.746 inches and 3.748 inches
Bolt Circle Diameter
6.000 inches
Flange Thickness
0.452 inches
Edge Shape
Round, multiears and holes
Body Radius
3.250 inches
Inverted Radius
0.250 inches
Ear Radius
0.563 inches
Ear Quantity
6
Bolt Circle Hole Quantity
6
First Recess Inside Height
1.015 inches
Inside Corner Radius
0.375 inches
Body Thickness
0.188 inches
Outside Corner Radius
0.500 inches
Body Outside Radius
0.500 inches
Pilot Height
Between 0.197 inches and 0.202 inches
Securing Device Type
Threaded fastener
Mounting Opening Shape Style
Unthreaded hole
Inside Angle
10.0 degrees
Material
Iron cast
Fsc Application Data
Ear axle differential, truck
NSN
5340-00-734-8110
Part Number
3866R18
Description
Cover,access
CAGE
78500

A rigid or flexible item of various shapes attached to a structure for the purpose of providing access for inspection, service, replacement of components and/or adjustments or mounting operations. It is designed to be attached by means of bolt holes, slots, mounting ears, tabs, and the like. To permit access, the mounted cover requires partial or complete removal. It may include an observation window. For items permanently attached by hinges and the like, see door, access (as modified). Excludes all covers not specifically designed to provide access for the purposes listed above.

Part 3866R18 NSN 5340-00-734-8110

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29785
FIIG:
A531C0
Concept No.:
App. Key:
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:
P
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
013120
UFC:
05380
LTL:
100.0
LCL:
100.0
WCC:
576
TCC:
Z
SHC:
9
ACC:
Equipment for Aircraft

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Schedule B and Export
  • Schedule B: 7325990000
  • SITC: 69963
  • End Use: Finished metal shapes
  • NAICS: 331511
  • USDA: 1

Freight Class: Cast articles of iron or steel nesoi

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