21529-3

View detailed technical data, stock status, and sourcing information for: 21529-3
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-274-7889

Item Name Code

15933

Assigment Date

01/01/1963 (63 years ago)

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.

0.125 inches nominal overall height, 0.406 inches minimum and 0.408 inches maximum hole diameter, 0.812 inches nominal outside diameter, 0.031 inches nominal recess depth, 0.019 inches nominal material thickness

Product Characteristics

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

Hole Diameter: 0.406 inches minimum and 0.408 inches maximum
Outside Diameter: 0.812 inches nominal
Overall Height: 0.125 inches nominal
Recess Depth: 0.031 inches nominal
Material Thickness: 0.019 inches nominal
Surface Finish: 63.0 microinches outer
Material: steel comp 410 or steel comp 416 overall
Material Document And Classification: qq-s-763 cond a fed spec 1st material response or astm a582 cond a assn std 2nd material response overall
Style Designator: recessed

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
212529-3	Recessed Washer
212529PC3	Recessed Washer
21529-3	Recessed Washer

FAQs

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

What is the FSCG of the NSN 5310-00-274-7889?

The FSCG of the NSN 5310-00-274-7889 is 5310

Does the NSN 5310-00-274-7889 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-00-274-7889 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 5310-00-274-7889 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-274-7889 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 5310-00-274-7889 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963