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Flat Washer NSN 5310-00-291-4680

Item Description

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.

NSN 5310-00-291-4680 NSN: 5310-00-291-4680

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Features and Characteristics

Cross Sectional Shape
Rectangular
Hole Diameter
Between 0.281 inches and 0.313 inches
Edge Shape
Round
Center Hole Shape
Round
Thickness
Between 0.193 inches and 0.213 inches
Overall Diameter
Between 0.922 inches and 0.954 inches
Min. Tensile Strength (psi)
500 pounds per square inch
Hardness Rating
Between 45.0 shore durometer a and 55.0 shore durometer a
Material
Rubber synthetic
Material Specification
417, gr sb505ab military standard single material response
FSC
5310 Nuts And Washers
NIIN
002914680
NSN
5310002914680

Manufacturer Part Numbers

Part numbers registered to this national stock number.

No part numbers found for this NSN.

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 4016930000
  • NAICS: 339991
  • SITC: 62999
  • Description: Gaskets, washers and other seals, of vulcanized rubber other than hard rubber
  • End Use (Code 12750):
    Industrial rubber products

Q & A

Frequently asked questions for NSN 5310-00-291-4680
What are the manufacturers of nsn 5310002914680?
Does this nsn 5310002914680 have a shelf life?
Yes. 36 mo. after cure date.
What is the formal definition of nsn 5310002914680
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.
Does nsn 5310002914680 contain any precious metals?
Precious metal content is unknown.
Does nsn 5310002914680 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310002914680?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
13393
FIIG:
A022B0
App. Key:
B
Cond. Code:
1
Status:
A

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