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Recessed Washer NSN 5310-00-081-8500

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 5310-00-081-8500 NSN: 5310-00-081-8500

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Features and Characteristics

Hole Diameter
Between 0.655 inches and 0.665 inches
Outside Diameter
Between 1.052 inches and 1.072 inches
Material Thickness
Between 0.120 inches and 0.150 inches
Features Provided
Casehardened
Hardness Rating
Between 40.0 rockwell c and 45.0 rockwell c
Top Recess Diameter
Between 0.715 inches and 0.735 inches
Bottom Recess Angle
90.0 degrees
Top Recess Angle
90.0 degrees
Bottom Recess Diameter
Between 0.715 inches and 0.735 inches
Material
Steel
Style Designator
Recessed both sides
FSC
5310 Nuts And Washers
NIIN
000818500
NSN
5310000818500

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
127316
Cage Code:
15434
Status:
A
MSDS:
Part Number:
10087976
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 5310-00-081-8500
What are the manufacturers of nsn 5310000818500?
Does this nsn 5310000818500 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310000818500
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 5310000818500 contain any precious metals?
Precious metal content is unknown.
Does nsn 5310000818500 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310000818500?
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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