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Recessed Washer NSN 5310-01-304-7974

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 5310-01-304-7974 NSN: 5310-01-304-7974

Features and Characteristics

Hole Diameter
Between 0.375 inches and 0.385 inches
Outside Diameter
Between 0.740 inches and 0.760 inches
Material Thickness
Between 0.120 inches and 0.130 inches
Top Recess Diameter
Between 0.020 inches and 0.030 inches
Bottom Recess Angle
Between 89.5 degrees and 90.5 degrees
Top Recess Angle
Between 89.5 degrees and 90.5 degrees
Bottom Recess Diameter
Between 0.020 inches and 0.030 inches
Surface Finish
63.0 microinches top
Material
Steel comp 630
Material Specification
Ams 5604 assn standard single material response or ams 5643 assn standard single material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2, cl 2 federal specification single treatment response
Style Designator
Recessed both sides
FSC
5310 Nuts And Washers
NIIN
013047974
NSN
5310013047974

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
140-007-24S24B4
Cage Code:
97499
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 5310-01-304-7974
What are the manufacturers of nsn 5310013047974?
Does this nsn 5310013047974 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310013047974
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 5310013047974 contain any precious metals?
No precious metal content.
Does nsn 5310013047974 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310013047974?
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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