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Flat Washer NSN 5310-00-264-0621

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 5310-00-264-0621 NSN: 5310-00-264-0621

Features and Characteristics

Cross Sectional Shape
Rectangular
Hole Diameter
Between 0.302 inches and 0.322 inches
Edge Shape
Round
Center Hole Shape
Round
Thickness
0.03125 inches
Overall Diameter
0.500 inches
Material
Copper alloy 11
Material Specification
Qq-b-613 federal specification single material response
Nondefinitive Specification/std Data
A type and 2 grade and e class
Departure From Cited Designator
As modified by thk
FSC
5310 Nuts And Washers
NIIN
002640621
NSN
5310002640621

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
FFW92TYPEAGRADE2CLASSE
Cage Code:
81348
Status:
A
MSDS:
Part Number:
E3096PC3155
Cage Code:
33667
Status:
A
MSDS:
Part Number:
E3213-2PC3155
Cage Code:
33667
Status:
A
MSDS:
Part Number:
3155
Cage Code:
33667
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 7415210000
  • NAICS: 332722
  • SITC: 69432
  • Description: Copper washers including spring washers not threaded
  • End Use (Code 12300):
    Finished metal shapes

Q & A

Frequently asked questions for NSN 5310-00-264-0621
What are the manufacturers of nsn 5310002640621?
Does this nsn 5310002640621 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310002640621
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 5310002640621 contain any precious metals?
Precious metal content is unknown.
Does nsn 5310002640621 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310002640621?
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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