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Flat Washer

Model A-3749-3

Quick Information about A-3749-3

Rectangular cross-sectional shape style, 0.593 inches hole diameter, round peripheral shape style, 1 round center hole shape style

For pricing and availability of this flat washer submit the price quote form on the right.

Product Details

  • NSN:
    5310-01-581-5853 (5310015815853)
  • Cross Shape:
    Rectangular
  • Hole Diameter:
    0.593 inches
  • Edge Shape:
    Round
  • Center Shape:
    1 round
  • Overall Diameter:
    0.718 inches
  • Schedule B Code:
    3926904500

Classification

Gaskets,washers & other seals

Definition Flat Washer

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes disk, valve, graphite impregnated and lubricated items.

Part Identification

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
13393
FIIG:
A022B0
Concept No.:
1
App. Key:
B
Cond. Code:
1
Status:
A

Part Materials

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
A
ESD:
A
MMAC:
CRITL:
X

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