Model: NAS1640-4

Lock Washer

Properties:

Hole Diameter
Between 0.115 inches and 0.124 inches
Outside Diameter
0.212 inches
Material Thickness
Between 0.025 inches and 0.031 inches
Hardness Rating
Between 35.0 rockwell c and 45.0 rockwell c
Material
Stainless steel
Material Specification
Fed standard 66, crew 300 series military standard single material response
Surface Treatment
Passivate
Surface Treatment Specification
Qq-p-35 federal specification single treatment response
Style Designator
Split helical-right hand
Nondefinitive Specification/std Data
C class
NSN
5310-00-442-6913
Part Number
NAS1640-4
Description
Washer,lock
CAGE
80205

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 NAS1640-4 NSN 5310-00-442-6913

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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
194160
UFC:
55210
LTL:
50.0
LCL:
50.0
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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