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Flat Washer NSN 5310-00-027-7307

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 5310-00-027-7307 NSN: 5310-00-027-7307

Features and Characteristics

Cross Sectional Shape
Rectangular
Hole Diameter
Between 0.255 inches and 0.275 inches
Edge Shape
Round
Center Hole Shape
Round
Thickness
Between 0.028 inches and 0.036 inches
Overall Diameter
Between 0.495 inches and 0.520 inches
Material
Steel
Surface Treatment
Cadmium
Surface Treatment Specification
Ams 2400 assn standard single treatment response
FSC
5310 Nuts And Washers
NIIN
000277307
NSN
5310000277307

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
591065
Cage Code:
31633
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 5310-00-027-7307
What are the manufacturers of nsn 5310000277307?
Does this nsn 5310000277307 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310000277307
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 5310000277307 contain any precious metals?
No precious metal content.
Does nsn 5310000277307 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310000277307?
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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