Model: MIL-B-17931NT

Annular Ball Bearing

Properties:

Overall Width
Between 0.3523 inches and 0.3543 inches
Bore Diameter
Between 0.3935 inches and 0.3937 inches
Overall Outside Diameter
Between 1.1809 inches and 1.1811 inches
Lubrication Material
Grease
Surface Finish
Ground
Retainer Fabrication Method
Pressed
Seal Quantity
2
Load Direction
Radial
Bore Shape
Straight
Internal Fit-up Designation
Standard
Internal Clearance
0.0003 inches radial and 0.0007 inches radial
Criticality Code Justification
Zzzw
Lubrication Material Specification
Mil-g-18709 military specification single material response
Material
Rubber synthetic seal
Material
Steel comp e52100 ball
Material
Steel comp e52100 inner ring
Material
Steel comp e52100 loading groove side
Material
Steel comp e52100 retainer
Style Designator
Non-loading groove, non-separable
Nondefinitive Specification/std Data
111 type and 8 class
Departure From Cited Document
Quiet operation tested for submarine use
NSN
3110-00-991-0897
Part Number
MIL-B-17931NT
Description
Bearing,ball,annular
CAGE
03950

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 MIL-B-17931NT NSN 3110-00-991-0897

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:
A
ESD:
ESD:
MMAC:
CRITL:
Y

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
2.5 X 2.5 X 1.5
Paclk Weight:
0.3000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
A
SPI No.:
SPI Rev.:
SPC Mkg:
24
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
114820
UFC:
58860
LTL:
77.5
LCL:
77.5
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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