WA21-4

View detailed technical data, stock status, and sourcing information for: WA21-4
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-641-9379

Item Name Code

14218

Assigment Date

01/01/1963 (63 years ago)

0.020 inches nominal material thickness, 0.370 inches minimum and 0.381 inches maximum outside diameter, flat external teeth style designator, 0.168 inches minimum and 0.176 inches maximum hole diameter, steel overall material

Product Characteristics

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

Hole Diameter: 0.168 inches minimum and 0.176 inches maximum
Outside Diameter: 0.370 inches minimum and 0.381 inches maximum
Material Thickness: 0.020 inches nominal
Material: steel overall
Style Designator: flat external teeth

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
WA21-4	Lock Washer

FAQs

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

What is the FSCG of the NSN 5310-00-641-9379?

The FSCG of the NSN 5310-00-641-9379 is 5310

Does the NSN 5310-00-641-9379 have a Schedule B code assigned?

Yes, the Schedule B code is 7318210000

Does NSN 5310-00-641-9379 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 5310-00-641-9379 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-641-9379 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 5310-00-641-9379 was assigned to the Federal Catalog?

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