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Recessed Washer NSN 5310-00-304-7980

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 5310-00-304-7980 NSN: 5310-00-304-7980

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Features and Characteristics

Hole Diameter
Between 0.390 inches and 0.395 inches
Outside Diameter
0.812 inches
Material Thickness
0.063 inches
Hardness Rating
Between 28.0 rockwell c and 37.0 rockwell c
Top Recess Diameter
Between 0.425 inches and 0.440 inches
Bottom Recess Angle
90.0 degrees
Top Recess Angle
90.0 degrees
Bottom Recess Diameter
Between 0.425 inches and 0.440 inches
Surface Finish
40.0 microinches all surfaces
Material
Steel
Material Specification
Ams 5643 assn standard single material response
Style Designator
Recessed both sides
FSC
5310 Nuts And Washers
NIIN
003047980
NSN
5310003047980

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
04-10311
Cage Code:
99167
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 5310-00-304-7980
What are the manufacturers of nsn 5310003047980?
Does this nsn 5310003047980 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310003047980
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 5310003047980 contain any precious metals?
Precious metal content is unknown.
Does nsn 5310003047980 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310003047980?
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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