4820-01-021-8371

Find complete technical information, availability, and procurement data for: 4820-01-021-8371
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-021-8371

Item Name Code

05487

Assigment Date

05/21/1976 (50 years ago)

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

3a 2nd end thread class, right-hand 2nd end thread direction, poppet flow control device, 3a 1st end thread class, right-hand 1st end thread direction

Product Characteristics

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

Thread Class: 3a 1st end
Thread Class: 3a 2nd end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Flow Control Device: poppet
Disk Loading Method: spring
Connection Style: flareless 1st end
Connection Style: flareless 2nd end
Connection Type: threaded external tube 2nd end
Connection Type: threaded external tube 1st end
Mounting Position: horizontal
Seat Angle: 12.0 degrees 1st end
Seat Angle: 12.0 degrees 2nd end
Nominal Outside Diameter Tube Accommodated: 0.250 inches 2nd end
Nominal Outside Diameter Tube Accommodated: 0.375 inches 1st end
Material: steel corrosion resisting overall
Surface Treatment: passivate
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
4C2856-1	Check Valve
A15HS017-2	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-021-8371?

The FSCG of the NSN 4820-01-021-8371 is 4820

Does the NSN 4820-01-021-8371 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-01-021-8371 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 4820-01-021-8371 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-021-8371 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 4820-01-021-8371 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Fri, May 21, 1976