28051-506-23

View detailed technical data, stock status, and sourcing information for: 28051-506-23
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-420-1204

Item Name Code

20520

Assigment Date

10/06/1995 (30 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.

shipboard material handling equipment (mhe) end item identification, right-hand all ends thread direction, -40.0 fahrenheit minimum operating temp, 250.0 fahrenheit single response maximum operating temp, 3a 1st end thread class

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 Direction: right-hand all ends
Maximum Operating Temp: 250.0 fahrenheit single response
Minimum Operating Temp: -40.0 fahrenheit
End Item Identification: shipboard material handling equipment (mhe)
Connection Style: external seat for gasket seal (boss) 1st end
Connection Style: plain (pipe) 2nd end
Valve Operation Method: automatic
Connection Type: threaded external boss 1st end
Connection Type: threaded external pipe 2nd end
Mounting Position: horizontal
Thread Quantity Per Inch: 12 1st end
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.750 inches 2nd end
Nominal Thread Size: 1.062 inches 1st end
Seat Angle: 37.0 degrees 1st end
Media For Which Designed: oil, hydraulic single response
Style Designator: straight thru
Thread Series Designator: nptf 2nd end
Thread Series Designator: un 1st 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
28051-506-23	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-420-1204?

The FSCG of the NSN 4820-01-420-1204 is 4820

Does NSN 4820-01-420-1204 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 4820-01-420-1204 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-420-1204 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 4820-01-420-1204 was assigned to the Federal Catalog?

It was assigned 30 years ago, on Fri, Oct 6, 1995