Model: HW428

Spring Tension Washer

Special Features:

Slotted and bent at two points on outer circumference, 180 degrees apart

Properties:

Hole Diameter
Between 0.318 inches and 0.323 inches
Outside Diameter
Between 0.984 inches and 1.016 inches
Overall Height
Between 0.130 inches and 0.140 inches
Material Thickness
Between 0.007 inches and 0.017 inches
Material
Copper alloy 170
Material Specification
Qq-c-533 federal specification single material response
NSN
5310-00-596-9785
Part Number
HW428
Description
Washer,spring Tension
CAGE
57057

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

Part HW428 NSN 5310-00-596-9785

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:
A
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
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:
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: 7415210000
  • SITC: 69432
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Copper washers including spring washers not threaded

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