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Flat Washer NSN 5310-01-205-5771

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 5310-01-205-5771 NSN: 5310-01-205-5771

Features and Characteristics

Cross Sectional Shape
Rectangular
Hole Diameter
Between 0.505 inches and 0.510 inches
Edge Shape
Round
Center Hole Shape
1 round
Thickness
0.032 inches
Overall Diameter
0.700 inches
Material
Copper alloy 230 or copper alloy 240 or copper alloy 260 or copper alloy 268 or copper alloy 342 or copper alloy 353 or copper alloy 11
Material Specification
Qq-b-613, half-hard federal specification all material responses
Surface Treatment
Nickel
Surface Treatment Specification
Qq-n-290 federal specification single treatment response
FSC
5310 Nuts And Washers
NIIN
012055771
NSN
5310012055771

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
A378-2
Cage Code:
86928
Status:
A
MSDS:
Part Number:
723220-42
Cage Code:
05869
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 5310-01-205-5771
What are the manufacturers of nsn 5310012055771?
Does this nsn 5310012055771 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310012055771
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 5310012055771 contain any precious metals?
No precious metal content.
Does nsn 5310012055771 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310012055771?
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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