202981

View detailed technical data, stock status, and sourcing information for: 202981
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-087-0306

Item Name Code

14218

Assigment Date

04/08/1967 (59 years ago)

A washer, usually round, with a centrally-located hole. Its edges and two bearing surfaces are designed in such a way that applied pressure brings into play the spring tension and/or frictional locking principle that materially resists any tendency toward turning. It may be made of one or two pieces.

0.493 inches maximum outside diameter, 46.0 rockwell c minimum and 52.0 rockwell c maximum hardness rating, steel comp 420 overall material, 0.255 inches minimum and 0.267 inches maximum hole diameter, 0.062 inches minimum 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: 0.255 inches minimum and 0.267 inches maximum
Outside Diameter: 0.493 inches maximum
Material Thickness: 0.062 inches minimum
Hardness Rating: 46.0 rockwell c minimum and 52.0 rockwell c maximum
Material: steel comp 420 overall
Material Document And Classification: sae assn std single material response overall
Style Designator: split helical-right hand

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
202981	Lock Washer

FAQs

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

What is the FSCG of the NSN 5310-00-087-0306?

The FSCG of the NSN 5310-00-087-0306 is 5310

Does the NSN 5310-00-087-0306 have a Schedule B code assigned?

Yes, the Schedule B code is 7318210000

Does NSN 5310-00-087-0306 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 5310-00-087-0306 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-00-087-0306 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 5310-00-087-0306 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Sat, Apr 8, 1967