11579911

View detailed technical data, stock status, and sourcing information for: 11579911
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-439-9537

Item Name Code

01869

Assigment Date

12/24/1996 (29 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.

0.565 inches nominal distance from centerline to inside of prebent key, 0.160 inches nominal external prebent key width, 0.630 inches nominal hole diameter, 1.550 inches nominal outside diameter, 0.031 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: 0.630 inches nominal
Outside Diameter: 1.550 inches nominal
External Prebent Key Width: 0.160 inches nominal
Distance From Centerline To Inside Of Prebent Key: 0.565 inches nominal
Material Thickness: 0.031 inches nominal
End Item Identification: used on mortar 81mm,xm252
Material: steel 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
11579911	Key Washer

FAQs

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

What is the FSCG of the NSN 5310-01-439-9537?

The FSCG of the NSN 5310-01-439-9537 is 5310

Does the NSN 5310-01-439-9537 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-01-439-9537 require demilitarization?

"commerce control list items (ccli) - mut to the point of scrap required outside the united states. Inside the united states, mut is required when the demil integrity code (ic) is "3" and mut is not required when the demic is "6" (note 8)"

Does NSN 5310-01-439-9537 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-439-9537 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 5310-01-439-9537 was assigned to the Federal Catalog?

It was assigned 29 years ago, on Tue, Dec 24, 1996