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Flat Washer NSN 5310-01-261-1604

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 5310-01-261-1604 NSN: 5310-01-261-1604

Features and Characteristics

Cross Sectional Shape
Rectangular
Hole Diameter
Between 0.314 inches and 0.322 inches
Edge Shape
Round
Center Hole Shape
1 round
Thickness
Between 0.068 inches and 0.072 inches
Overall Diameter
Between 0.488 inches and 0.496 inches
Special Features
Outside left corner radius 0.029 in. Min 0.031 in. Max, outside right corner radius 0.029 in. Min 0.031 in. Max
Material
Steel comp 416
Material Specification
Astm a582, cond a assn standard single material response
Surface Treatment
Passivate
Surface Treatment Specification
Qq-p-35 federal specification single treatment response
FSC
5310 Nuts And Washers
NIIN
012611604
NSN
5310012611604

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
196B7317-2
Cage Code:
05606
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 5310-01-261-1604
What are the manufacturers of nsn 5310012611604?
Does this nsn 5310012611604 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310012611604
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 5310012611604 contain any precious metals?
No precious metal content.
Does nsn 5310012611604 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310012611604?
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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