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Flat Washer NSN 5310-01-193-3991

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 5310-01-193-3991 NSN: 5310-01-193-3991

Features and Characteristics

Cross Sectional Shape
Rectangular
Hole Diameter
Between 0.195 inches and 0.205 inches
Edge Shape
Round
Center Hole Shape
1 round
Thickness
0.032 inches
Overall Diameter
0.312 inches
Material
Steel comp 301 or steel comp 302 or steel comp 304 or steel comp 305 or steel comp 309 or steel comp 310 or steel comp 316 or steel comp 321 or steel comp 323 or steel comp 347 or steel comp 348
Material Specification
Qq-s-766, cond a, finish 2d or 2b federal specification all material responses
Surface Treatment
Passivate
Surface Treatment Specification
Qq-p-35 federal specification single treatment response
FSC
5310 Nuts And Washers
NIIN
011933991
NSN
5310011933991

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
240658
Cage Code:
09205
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 5310-01-193-3991
What are the manufacturers of nsn 5310011933991?
Does this nsn 5310011933991 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310011933991
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 5310011933991 contain any precious metals?
No precious metal content.
Does nsn 5310011933991 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310011933991?
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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