Model: 251-81

Annular Ball Bearing

Properties:

Overall Width
0.8270 inches
Bore Diameter
35.00 millimeters
Overall Outside Diameter
72.00 millimeters
Lubrication Material
Grease
Outer Ring Width
0.6690 inches
Inner Ring Width
0.7870 inches
Surface Finish
Ground
Retainer Fabrication Method
Pressed
Seal Quantity
1
Shield Quantity
1
Bearing Seal Type
Contact
Load Direction
Radial
Bore Shape
Straight
Internal Fit-up Designation
Standard
Standard Tolerance Designation
Abec no.1
Lubrication Material
Grease
Lubrication Material Specification
Dod-g-24508 military specification single material response
Material
Steel ball
Material
Steel inner ring
Material
Steel outer ring
Material
Steel retainer
Material
Steel shield
Style Designator
Non-loading groove, non-separable
Nondefinitive Specification/std Data
117 type and 1 class
Departure From Cited Designator
As modified by shield quantity
NSN
3110-00-156-3575
Part Number
251-81
Description
Bearing,ball,annular
CAGE
60361

A cylindrical device in which the inner or outer ring turns upon a single or double row of hardened balls which roll easily between the two rings, thus minimizing friction. For items with faces specially ground for duplex mounting see bearing, ball, duplex. Excludes bearing, ball, airframe.

Part 251-81 NSN 3110-00-156-3575

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00014
FIIG:
A044A0
Concept No.:
App. Key:
C
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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.7000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
M
SPI No.:
SPI Rev.:
SPC Mkg:
ZZ
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
114820
UFC:
58860
LTL:
77.5
LCL:
--
WCC:
742
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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Schedule B and Export
  • Schedule B: 8482105028
  • SITC: 74610
  • End Use: Industrial machines, other
  • NAICS: 332991
  • USDA: 1

Freight Class: Angular contact ball bearings, nesoi

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