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Flat Washer NSN 5310-00-497-7313

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 5310-00-497-7313 NSN: 5310-00-497-7313

Features and Characteristics

Cross Sectional Shape
Rectangular
Hole Diameter
0.508 inches
Edge Shape
Round
Center Hole Shape
Round w/flats
Thickness
Between 0.185 inches and 0.195 inches
Overall Diameter
Between 1.960 inches and 2.000 inches
Hole Width Across Flats
1.070 inches
Min. Tensile Strength (psi)
160000 pounds per square inch
Material
Steel
Material Specification
Mil-s-6758 military specification single material response
Surface Treatment
Cadmium
Test Data Document
81349-mil-i-6870 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
FSC
5310 Nuts And Washers
NIIN
004977313
NSN
5310004977313

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
2578626-001A
Cage Code:
06848
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 7318220000
  • NAICS: 332722
  • SITC: 69422
  • Description: Washers other than lock washers, iron or steel
  • End Use (Code 12300):
    Finished metal shapes

Q & A

Frequently asked questions for NSN 5310-00-497-7313
What are the manufacturers of nsn 5310004977313?
Does this nsn 5310004977313 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310004977313
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 5310004977313 contain any precious metals?
Precious metal content is unknown.
Does nsn 5310004977313 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310004977313?
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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