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Flat Washer NSN 5310-01-357-4621

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 5310-01-357-4621 NSN: 5310-01-357-4621

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Features and Characteristics

Cross Sectional Shape
Rectangular
Hole Diameter
Between 0.520 inches and 0.530 inches
Edge Shape
Round
Center Hole Shape
1 round
Thickness
0.025 inches
Overall Diameter
Between 0.880 inches and 0.900 inches
Color
Black
Material
Steel comp 301
Material Specification
Mil-s-5059 military specification single material response
Surface Treatment
Oxide
Surface Treatment Specification
Mil-c-13924 military specification single treatment response
FSC
5310 Nuts And Washers
NIIN
013574621
NSN
5310013574621

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
03A250C52C88
Cage Code:
76823
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 5310-01-357-4621
What are the manufacturers of nsn 5310013574621?
Does this nsn 5310013574621 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310013574621
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 5310013574621 contain any precious metals?
No precious metal content.
Does nsn 5310013574621 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310013574621?
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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