4820-01-358-8939

Find complete technical information, availability, and procurement data for: 4820-01-358-8939
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-358-8939

Item Name Code

52995

Assigment Date

05/22/1992 (34 years ago)

A dual purpose marine valve used primarily with shipboard cargo tanks and bulkheads. It acts both as a vent valve, to relieve vacuum and pressure, and a check valve, to prevent cargo contamination. It is equipped with an internal flame screen and/or a protective mesh and may include a hinged cover.

round with holes all ends flange shape, automatic valve operation method, flange all ends connection type, 4 all ends bolt hole quantity, ball flow control device

Product Characteristics

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

Flow Control Device: ball
Bolt Hole Quantity: 4 all ends
Valve Operation Method: automatic
Flange Shape: round with holes all ends
Connection Type: flange all ends
Mounting Position: vertical
Nominal Outside Diameter: 7.500 inches 1st end
Nominal Thickness: 0.625 inches all ends
Bolt Hole Nominal Diameter: 0.625 inches all ends
Bolt Circle Nominal Diameter: 6.000 inches all ends
Flange Face Design: plain 1st end
Special Features: without cover
Material: copper alloy body
Style Designator: straight thru

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
52-20F 3 INCH FLG BRZ	Vent-Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-358-8939?

The FSCG of the NSN 4820-01-358-8939 is 4820

Does NSN 4820-01-358-8939 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 4820-01-358-8939 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-358-8939 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 4820-01-358-8939 was assigned to the Federal Catalog?

It was assigned 34 years ago, on Fri, May 22, 1992