Model: 310-0290-00

Lock Washer

Properties:

Hole Diameter
Between 0.318 inches and 0.328 inches
Outside Diameter
0.586 inches
Material Thickness
Between 0.078 inches and 0.088 inches
Hardness Rating
Between 35.0 rockwell c and 45.0 rockwell c or 45.0 rockwell c and 53.0 rockwell c
Material
Steel comp 302 and steel comp 420
Material Specification
Fed standard 66, aisi 302 or sae 30302 federal standard 1st material response and federal standard 66, aisi 420 or sae 51420 federal standard 2nd 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
2 style and c class
NSN
5310-00-042-6759
Part Number
310-0290-00
Description
Washer,lock
CAGE
13499

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 310-0290-00 NSN 5310-00-042-6759

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

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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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