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Recessed Washer NSN 5310-00-553-3939

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 5310-00-553-3939 NSN: 5310-00-553-3939

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Features and Characteristics

Hole Diameter
Between 0.252 inches and 0.260 inches
Outside Diameter
0.531 inches
Recess Diameter
Between 0.334 inches and 0.344 inches
Material Thickness
0.078 inches
Min. Tensile Strength (psi)
125000 pounds per square inch
Hardness Rating
Between 46.0 rockwell c and 50.0 rockwell c
Recess Angle
90.0 degrees
Material
Steel comp 1330 or steel comp 4130
Surface Treatment
Nickel
Surface Treatment Specification
Mil-c-26074, class 1 military specification single treatment response or qq-n-290, class 1, grade c federal specification single treatment response
Style Designator
Recessed
FSC
5310 Nuts And Washers
NIIN
005533939
NSN
5310005533939

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
51-501-27
Cage Code:
1YRX6
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 5310-00-553-3939
What are the manufacturers of nsn 5310005533939?
Does this nsn 5310005533939 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310005533939
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 5310005533939 contain any precious metals?
Precious metal content is unknown.
Does nsn 5310005533939 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310005533939?
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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