SS-8C-EP-FG-1/3

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-646-6620

Item Name Code

77777

Assigment Date

07/28/2015 (11 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.

zzzy criticality code justification, material will be in accordance with navsup-wss activity hx quality control, manufacturing and testing specifications reference number differentiating characteristics

Product Characteristics

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

Criticality Code Justification: zzzy
Reference Number Differentiating Characteristics: material will be in accordance with navsup-wss activity hx quality control, manufacturing and testing specifications

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
SS-8C-EP-FG-1/3	Poppet Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-646-6620?

The FSCG of the NSN 4820-01-646-6620 is 4820

Does NSN 4820-01-646-6620 require demilitarization?

Usml or ccl military items - demil required. Item managers,, equipment specialists, or product specialists must furnish special demilinstructions. (note 3).

Does NSN 4820-01-646-6620 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-646-6620 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 4820-01-646-6620 was assigned to the Federal Catalog?

It was assigned 11 years ago, on Tue, Jul 28, 2015