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Flat Washer NSN 5310-01-131-2258

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 5310-01-131-2258 NSN: 5310-01-131-2258

Features and Characteristics

Cross Sectional Shape
Rectangular
Hole Diameter
Between 0.675 inches and 0.685 inches
Edge Shape
Round
Center Hole Shape
1 round
Thickness
Between 0.130 inches and 0.140 inches
Overall Diameter
Between 0.980 inches and 1.010 inches
Surface Finish
125.0 microinches top
Material
Steel comp 4140 or steel comp e4340
Material Specification
Mil-s-5626 military specification 1st material response or mil-s-5000 military specification 2nd material response
FSC
5310 Nuts And Washers
NIIN
011312258
NSN
5310011312258

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
42312D176
Cage Code:
82402
Status:
A
MSDS:
Part Number:
10109595
Cage Code:
A486G
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 5310-01-131-2258
What are the manufacturers of nsn 5310011312258?
Does this nsn 5310011312258 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310011312258
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 5310011312258 contain any precious metals?
No precious metal content.
Does nsn 5310011312258 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310011312258?
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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