5310-01-056-7259

Find complete technical information, availability, and procurement data for: 5310-01-056-7259
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-056-7259

Item Name Code

15933

Assigment Date

02/28/1978 (48 years ago)

A bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.

0.125 inches minimum material thickness, 0.398 inches minimum and 0.408 inches maximum top recess diameter, 0.328 inches nominal hole diameter, 0.552 inches minimum and 0.572 inches maximum outside diameter, 240000 pounds per square inch minimum tensile strength

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Hole Diameter: 0.328 inches nominal
Outside Diameter: 0.552 inches minimum and 0.572 inches maximum
Material Thickness: 0.125 inches minimum
Minimum Tensile Strength: 240000 pounds per square inch
Top Recess Diameter: 0.398 inches minimum and 0.408 inches maximum
Bottom Recess Angle: 89.5 degrees minimum and 90.5 degrees maximum
Top Recess Angle: 89.5 degrees minimum and 90.5 degrees maximum
Bottom Recess Diameter: 0.398 inches minimum and 0.408 inches maximum
Surface Finish: 63.0 microinches bottom
Surface Finish: 63.0 microinches top
Material: steel comp h11 overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: mil-c-8837,ty 2,cl 2 mil spec single treatment response overall
Style Designator: recessed both sides

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-01-025-3487	No Name Available	05/01/1980

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
140-007-21-18C4	Recessed Washer

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5310-01-056-7259?

The FSCG of the NSN 5310-01-056-7259 is 5310

Does the NSN 5310-01-056-7259 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-01-056-7259 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 5310-01-056-7259 contain precious materials?

Precious metal content is unknown

Does NSN 5310-01-056-7259 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 5310-01-056-7259 was assigned to the Federal Catalog?

It was assigned 48 years ago, on Tue, Feb 28, 1978