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Flat Washer NSN 5310-00-991-8363

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 5310-00-991-8363 NSN: 5310-00-991-8363

Features and Characteristics

Cross Sectional Shape
Rectangular
Hole Diameter
Between 0.247 inches and 0.253 inches
Edge Shape
Round
Center Hole Shape
1 round
Thickness
Between 0.058 inches and 0.062 inches
Overall Diameter
Between 0.490 inches and 0.494 inches
Material
Plastic polytetrafluoroethylene
Material Specification
Es-0774, fscm 06848 mfr ref single material response
FSC
5310 Nuts And Washers
NIIN
009918363
NSN
5310009918363

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
2637059
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: 3926904500
  • NAICS: 339991
  • SITC: 89399
  • Description: Gaskets,washers & other seals
  • End Use (Code 12770):
    Other industrial supplies

Q & A

Frequently asked questions for NSN 5310-00-991-8363
What are the manufacturers of nsn 5310009918363?
Does this nsn 5310009918363 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310009918363
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 5310009918363 contain any precious metals?
Precious metal content is unknown.
Does nsn 5310009918363 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310009918363?
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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