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Recessed Washer NSN 5310-01-298-1309

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 5310-01-298-1309 NSN: 5310-01-298-1309

Features and Characteristics

Hole Diameter
21.0 millimeters
Outside Diameter
37.0 millimeters
Recess Depth
Between 2.0 millimeters and 2.5 millimeters
Material Thickness
4.0 millimeters
Recess Angle
90.0 degrees
Material
Steel
Surface Treatment
Zinc and chromate
Surface Treatment Specification
Din 267, cagec d8286 mfr ref single treatment response
Style Designator
15 recessed
FSC
5310 Nuts And Washers
NIIN
012981309
NSN
5310012981309

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
DIN6916-M20-A4C
Cage Code:
15526
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 5310-01-298-1309
What are the manufacturers of nsn 5310012981309?
Does this nsn 5310012981309 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310012981309
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 5310012981309 contain any precious metals?
No precious metal content.
Does nsn 5310012981309 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310012981309?
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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