Model: 20957-22

Lock Washer
Description:

0.141 inches hole diameter, 0.253 inches outside diameter, 0.031 inches material thickness, 45.0 rockwell c hardness rating, steel comp 1060 or steel comp 1070 or steel comp 1078 or steel comp 1080 material.

Properties:

Hole Diameter
Between 0.141 inches and 0.151 inches
Outside Diameter
0.253 inches
Material Thickness
0.031 inches
Hardness Rating
Between 45.0 rockwell c and 53.0 rockwell c
Material
Steel comp 1060 or steel comp 1070 or steel comp 1078 or steel comp 1080
Material Specification
Astm a576 assn standard all material responses
Surface Treatment
Cadmium or zinc
Style Designator
Split helical-right hand
Nondefinitive Specification/std Data
A class and 2 style
NSN
5310-00-013-1044
Part Number
20957-22
Description
Washer,lock
CAGE
94204

A washer which is usually round with a centrally located hole. Its edges and two bearing surfaces are so designed that applied pressure brings into play the spring tension and/or frictional locking principle which materially resists any tendency toward turning. It may be made of one or two pieces

Part 20957-22 NSN 5310-00-013-1044

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
14218
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:
SX
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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