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Recessed Washer NSN 5310-01-306-3520

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 5310-01-306-3520 NSN: 5310-01-306-3520

Features and Characteristics

Hole Diameter
Between 0.504 inches and 0.515 inches
Outside Diameter
Between 0.870 inches and 0.890 inches
Recess Diameter
Between 0.604 inches and 0.620 inches
Material Thickness
0.080 inches
Recess Angle
90.0 degrees
Material
Aluminum alloy 5052
Material Specification
Qq-a-250/8, h34 federal specification single material response or qq-a-250/8, h36 federal specification single material response or qq-a-250/8, h38 federal specification single material response
Surface Treatment
Anodize or chromate
Surface Treatment Specification
Mil-a-8625 military specification 1st treatment response or mil-c-5541 military specification 2nd treatment response
Style Designator
15 recessed
FSC
5310 Nuts And Washers
NIIN
013063520
NSN
5310013063520

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
SS5103D08
Cage Code:
78286
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 7616108000
  • NAICS: 332722
  • SITC: 69440
  • Description: Cotters, cotter-pins, washers and similar articles, of aluminum
  • End Use (Code 12300):
    Finished metal shapes

Q & A

Frequently asked questions for NSN 5310-01-306-3520
What are the manufacturers of nsn 5310013063520?
Does this nsn 5310013063520 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310013063520
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 5310013063520 contain any precious metals?
No precious metal content.
Does nsn 5310013063520 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310013063520?
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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