Model: ST4M159-3

Spring Tension Washer

Special Features:

Recess angle 105 degrees min, 115 degrees max

Properties:

Hole Diameter
Between 0.180 inches and 0.184 inches
Outside Diameter
Between 0.320 inches and 0.350 inches
Material Thickness
0.021 inches
Surface Finish
63.0 microinches all surfaces
Material
Steel comp 302 or steel comp 304
Material Specification
Qq-s-766, cond a federal specification all material responses
Surface Treatment
Passivate
Surface Treatment Specification
Qq-p-35 federal specification single treatment response
Style Designator
Spring tension
NSN
5310-00-352-0478
Part Number
ST4M159-3
Description
Washer,spring Tension
CAGE
76301

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

Part ST4M159-3 NSN 5310-00-352-0478

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:
194120
UFC:
95100
LTL:
RATING VARIABLE
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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