4820-00-021-1728

Find complete technical information, availability, and procurement data for: 4820-00-021-1728
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-021-1728

Item Name Code

60396

Assigment Date

04/27/1967 (59 years ago)

An item in the form of one or more thin flexible sheets normally designed to form a tight seal between chambers of a valve, and to transmit motion to a valve disk either directly or through a mechanical linkage. The surface of the item(s) may not be formed or molded to have a beaded or rolled edge, ribs, or any other raised surfaces. The item may contain bolt holes and/or a center hole. Excludes:diaphragm, valve, special shaped and gasket.

18.250 inches nominal outside diameter, 0.438 inches nominal center hole diameter, 17.625 inches nominal bolt circle diameter, 0.130 inches nominal material thickness, 0.312 inches nominal hole diameter

Product Characteristics

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

Hole Diameter: 0.312 inches nominal
Outside Diameter: 18.250 inches nominal
Bolt Circle Diameter: 17.625 inches nominal
Material Thickness: 0.130 inches nominal
Center Hole Diameter: 0.438 inches nominal
Bolt Hole Quantity: 24
Material: rubber synthetic
Style Designator: flat

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
A4358	Flat Valve Diaphragm

FAQs

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

What is the FSCG of the NSN 4820-00-021-1728?

The FSCG of the NSN 4820-00-021-1728 is 4820

Does the NSN 4820-00-021-1728 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-021-1728 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 4820-00-021-1728 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-021-1728 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 4820-00-021-1728 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Thu, Apr 27, 1967