4820-01-521-0491

Find complete technical information, availability, and procurement data for: 4820-01-521-0491
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-521-0491

Item Name Code

35935

Assigment Date

06/08/2004 (22 years ago)

A valve with a bolt or stem that may be mechanically actuated to two different positions by rotary or linear motion. In the first position, the valve disk is located and locked against the seat permitting no fluid flow through the valve. In the second position, one side of the valve disk is located against the seat permitting movement of the disk in a manner that will allow a flow of fluid in one direction through the valve. The valve disk may be spring loaded. It may be inline or cartridge (manifold) design. See also valve (1), lift-check and valve (1), stop-lift-check.

threaded internal pipe all ends connection type, copper flow control device material, straight thru style designator, "cast steel body; stainless steel 20-mesh flame screen and 1/4" protective screen. p/l 3-080 and 3-080-mi. model 52-20t (threaded)" special features, steel body material

Product Characteristics

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

Connection Type: threaded internal pipe all ends
Special Features: "cast steel body; stainless steel 20-mesh flame screen and 1/4" protective screen. p/l 3-080 and 3-080-mi. model 52-20t (threaded)"
Material: copper flow control device
Material: steel body
Style Designator: straight thru
Furnished Items And Quantity: 1 float

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
020210312K	Vent Valve
52-20T 2IN STL	Vent Valve

FAQs

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

What is the FSCG of the NSN 4820-01-521-0491?

The FSCG of the NSN 4820-01-521-0491 is 4820

Does the NSN 4820-01-521-0491 have a Schedule B code assigned?

Yes, the Schedule B code is 8481809050

Does NSN 4820-01-521-0491 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 4820-01-521-0491 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-521-0491 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 4820-01-521-0491 was assigned to the Federal Catalog?

It was assigned 22 years ago, on Tue, Jun 8, 2004