Model: 321250

Groove Pulley

Special Features:

Securing holescounterbored 0.312 in. Diaby .037/.077 in. Deep, onerectangular notch located in outer edge, base of notch 1.530/1.540 in. From center, 0.498/0.501 in. W

Properties:

Spline Major Diameter
0.682 inches
Groove Depth
0.187 inches
Outside Diameter
4.375 inches
Bolt Circle Diameter
2.500 inches
Spline Quantity
12
Spline Minor Diameter
Between 0.560 inches and 0.563 inches
Drilled Hole Diameter
Between 0.191 inches and 0.194 inches
V Groove Angle In Deg
30.0
Securing Hole Quantity
18
Material And Location
Aluminum alloy, 24st, aluminum co of america or aluminum alloy, ams 4037,
Face Width
Between 0.225 inches and 0.250 inches
Design Form
Plain
Bore Type
Involute spline
Bearings
Not included
Spline Pressure Angle In Deg
30.0
Spline Length
Between 0.223 inches and 0.225 inches
Groove Quantity
1
Spline Pitch Diameter
0.6000 inches
Hole Location
Holes equally spaced, 1st hole in line w/centerline through spline grooves within 0.030
Securing Method
Drilled hole
Split Hub Feature
Not included
Lightening Hole
Not included
Integral Cooling Vane
Not included
Groove Shape
V
Bore Feature
Included
Surface Treatment
Painted, hs35 73030
Style Designator
Plain
Surface Treatment
Painted, hs35 73030
NSN
3020-00-098-1781
Part Number
321250
Description
Pulley,groove
CAGE
73030

A pulley with one or more grooved faces or rims of the same diameter. For pulleys encased in a shell or frame, see block, tackle. for items specifically designed for aviation, see pulley(1), groove, aviation.

Part 321250 NSN 3020-00-098-1781

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
08109
FIIG:
T353-A
Concept No.:
1
App. Key:
AA
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:
127320
UFC:
64560
LTL:
70.0
LCL:
--
WCC:
593
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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Schedule B and Export
  • Schedule B: 8487900080
  • SITC: 74999
  • End Use: Industrial machines, other
  • NAICS: 333999
  • USDA: 1

Freight Class: Machinery parts not containing electrical features, and not specified or included elsewhere in chapter 84, except ships' propellers

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