D559B-6M-30

View detailed technical data, stock status, and sourcing information for: D559B-6M-30
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-181-5293

Item Name Code

05488

Assigment Date

06/11/1984 (42 years ago)

A fluid line fitting having a pipe, tube or hose connection or a through hole to accommodate a bolt, fluid passage on one end. The other end must have an internal or external quick disconnect feature for connecting a mating part to form a quick disconnect coupling assembly. The fitting may incorporate a self-sealing feature for the purpose of automatically shutting off the flow of fluid when disconnected from its mating half. For self-sealing fittings with an external or internal threaded disconnect end, see coupling half, self-sealing. See also, connector, multiple, fluid pressure line.

right-hand all ends thread direction, 250.0 fahrenheit 2nd response maximum operating temp, -40.0 fahrenheit 1st response maximum operating temp, poppet flow control device, spring disk loading method

Product Characteristics

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

Thread Direction: right-hand all ends
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: -40.0 fahrenheit 1st response
Maximum Operating Temp: 250.0 fahrenheit 2nd response
Connection Style: plain (pipe) all ends
Valve Operation Method: automatic
Connection Type: threaded external pipe all ends
Maximum Operating Pressure: 200.0 pounds per square inch single response
Nominal Thread Size: 0.750 inches all ends
Opening Pressure Setting: 30.0 pounds per square inch
Material: copper alloy body
Media For Which Designed: acetylene 2nd response
Media For Which Designed: air 1st response
Media For Which Designed: ammonia, gaseous 3rd response
Media For Which Designed: hydrogen 5th response
Media For Which Designed: refrigerant 12 4th response
Style Designator: straight thru
Thread Series Designator: npt all ends
Furnished Items And Quantity: 1 deflector cap

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
D559B-6M-30	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-181-5293?

The FSCG of the NSN 4820-01-181-5293 is 4820

Does the NSN 4820-01-181-5293 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-181-5293 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 4820-01-181-5293 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-181-5293 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 4820-01-181-5293 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Mon, Jun 11, 1984