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Recessed Washer NSN 5310-01-270-8858

Item Description

A washer of any peripheral shape having a centrally located hole. Both bearing surfaces are parallel and flat, but one or both of the bearing surfaces must be broken by a counterbore, countersink, or similarly shaped recess. The thickness must not exceed 25 per cent of the outside diameter or the largest outside dimension. The maximum limit of the tolerance or range applied to the thickness and/or largest outside dimension must be used to determine compliance. Excludes washer, concave, retainer, packing, and thrust type washers. See also spacer, sleeve; and spacer, stepped.

NSN 5310-01-270-8858 NSN: 5310-01-270-8858

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Features and Characteristics

Hole Diameter
Between 0.318 inches and 0.338 inches
Outside Diameter
Between 0.5525 inches and 0.5725 inches
Material Thickness
Between 0.089 inches and 0.099 inches
Min. Tensile Strength (psi)
240000 pounds per square inch
Top Recess Diameter
Between 0.358 inches and 0.378 inches
Bottom Recess Angle
Between 89.0 degrees and 91.0 degrees
Top Recess Angle
Between 89.0 degrees and 91.0 degrees
Bottom Recess Diameter
Between 0.358 inches and 0.378 inches
Surface Finish
63.0 microinches top
Special Features
0.020 in. Min thk at id
Material
Steel comp h11
Material Specification
Ams 6485 assn standard single material response or ams 6487 assn standard single material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Mil-c-8837, ty2, cl2 military specification single treatment response
Style Designator
Recessed both sides
FSC
5310 Nuts And Washers
NIIN
012708858
NSN
5310012708858

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
140-007-21-18A3
Cage Code:
97499
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 5310-01-270-8858
What are the manufacturers of nsn 5310012708858?
Does this nsn 5310012708858 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310012708858
A washer of any peripheral shape having a centrally located hole. both bearing surfaces are parallel and flat, but one or both of the bearing surfaces must be broken by a counterbore, countersink, or similarly shaped recess. the thickness must not exceed 25 per cent of the outside diameter or the largest outside dimension. the maximum limit of the tolerance or range applied to the thickness and/or largest outside dimension must be used to determine compliance. excludes washer, concave, retainer, packing, and thrust type washers. see also spacer, sleeve; and spacer, stepped.
Does nsn 5310012708858 contain any precious metals?
No precious metal content.
Does nsn 5310012708858 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310012708858?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
15933
FIIG:
A022B0
App. Key:
A
Cond. Code:
1
Status:
A

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