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Recessed Washer NSN 5310-01-256-9734

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 5310-01-256-9734 NSN: 5310-01-256-9734

Features and Characteristics

Hole Diameter
Between 0.5156 inches and 0.5256 inches
Outside Diameter
Between 0.990 inches and 1.010 inches
Material Thickness
Between 0.183 inches and 0.193 inches
Min. Tensile Strength (psi)
170000 pounds per square inch
Bottom Recess Angle
Between 89.0 degrees and 91.0 degrees
Top Recess Angle
Between 89.0 degrees and 91.0 degrees
Surface Finish
63.0 microinches top
Special Features
0.020 in. Min thk at id
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, ty2, cl2 federal specification single treatment response
Style Designator
Recessed both sides
FSC
5310 Nuts And Washers
NIIN
012569734
NSN
5310012569734

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
140-007-33S32E6
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 5310-01-256-9734
What are the manufacturers of nsn 5310012569734?
Does this nsn 5310012569734 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5310012569734
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 5310012569734 contain any precious metals?
No precious metal content.
Does nsn 5310012569734 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5310012569734?
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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