Model: 3502-20-28

Spring Tension Washer

Properties:

Hole Diameter
Between 0.376 inches and 0.382 inches
Outside Diameter
Between 0.558 inches and 0.568 inches
Overall Height
Between 0.068 inches and 0.088 inches
Material Thickness
Between 0.009 inches and 0.011 inches
Hardness Rating
Between 40.0 rockwell c and 50.0 rockwell c
Material
Steel comp 1050
Material Specification
Sae assn standard single material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2, cl 2 federal specification single treatment response
NSN
5310-00-557-8748
Part Number
3502-20-28
Description
Washer,spring Tension
CAGE
78189

A bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.

Part 3502-20-28 NSN 5310-00-557-8748

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15938
FIIG:
A022B0
Concept No.:
1
App. Key:
A
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:
0.1000lbs
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:

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
194160
UFC:
55210
LTL:
50.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318210000
  • SITC: 69422
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Spring washers and other lock washers, iron or steel

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