343903-4

View detailed technical data, stock status, and sourcing information for: 343903-4
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-316-2452

Item Name Code

01869

Assigment Date

03/07/1990 (36 years ago)

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes:disk, valve, graphite impregnated and lubricated items.

0.390 inches minimum and 0.410 inches maximum outside diameter, 0.270 inches minimum and 0.280 inches maximum distance from centerline to inside of prebent key, 0.060 inches nominal external prebent key length, 0.189 inches nominal hole diameter, 0.100 inches minimum and 0.110 inches maximum external prebent key width

Product Characteristics

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

Hole Diameter: 0.189 inches nominal
Outside Diameter: 0.390 inches minimum and 0.410 inches maximum
External Prebent Key Length: 0.060 inches nominal
External Prebent Key Width: 0.100 inches minimum and 0.110 inches maximum
Distance From Centerline To Inside Of Prebent Key: 0.270 inches minimum and 0.280 inches maximum
Overall Distance Including Keys: 0.395 inches nominal
Material Thickness: 0.025 inches nominal
Material: steel comp 302 or steel comp 303 or steel comp 303se or steel comp 304 or steel comp 305 or steel comp 316 or steel comp 321 or steel comp 347 overall
Style Designator: key

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
343903-4	Key Washer

FAQs

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

What is the FSCG of the NSN 5310-01-316-2452?

The FSCG of the NSN 5310-01-316-2452 is 5310

Does the NSN 5310-01-316-2452 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-01-316-2452 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 5310-01-316-2452 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-316-2452 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 5310-01-316-2452 was assigned to the Federal Catalog?

It was assigned 36 years ago, on Wed, Mar 7, 1990