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Recessed Washer NSN 5310-00-326-3721

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 5310-00-326-3721 NSN: 5310-00-326-3721

Features and Characteristics

Hole Diameter
Between 1.135 inches and 1.150 inches
Outside Diameter
Between 1.970 inches and 2.030 inches
Recess Diameter
1.375 inches
Material Thickness
0.188 inches
Hardness Rating
Between 39.0 rockwell c and 42.0 rockwell c
Recess Angle
90.0 degrees
Heat Treatment
Quenched and tempered
Material
Steel
Material Specification
Ams 6359 assn standard single material response
Surface Treatment
Cadmium
Style Designator
Recessed
FSC
5310 Nuts And Washers
NIIN
003263721
NSN
5310003263721

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
A51B25129-12
Cage Code:
61174
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 5310-00-326-3721
What are the manufacturers of nsn 5310003263721?
Does this nsn 5310003263721 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310003263721
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 5310003263721 contain any precious metals?
Precious metal content is unknown.
Does nsn 5310003263721 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310003263721?
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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