4820-01-021-8370

Find complete technical information, availability, and procurement data for: 4820-01-021-8370
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-021-8370

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, 3a 1st end thread class, poppet flow control device, right-hand 1st end thread direction, right-hand 2nd 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
Valve Operation Method: automatic
Connection Type: threaded external tube 2nd end
Connection Type: threaded external tube 1st end
Mounting Position: horizontal
Maximum Operating Pressure: 4000.0 pounds per square inch single response
Nominal Thread Size: 0.562 inches 1st end
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
Surface Treatment: passivate
Style Designator: straight thru
Thread Series Designator: unf 2nd end

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
4C2854	Check Valve
A15HS017-1	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-021-8370?

The FSCG of the NSN 4820-01-021-8370 is 4820

Does the NSN 4820-01-021-8370 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-01-021-8370 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 4820-01-021-8370 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-021-8370 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 4820-01-021-8370 was assigned to the Federal Catalog?

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