D559T-4D-1

View detailed technical data, stock status, and sourcing information for: D559T-4D-1
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-208-7109

Item Name Code

05488

Assigment Date

04/15/1973 (53 years ago)

A valve, designed for attachment to pressure tanks and/or mechanical equipment for the purpose of permitting an increase, decrease, and the gaging of pressure (similar to tire valves) within a confining chamber carrying compressed air, gases or oil.

280.0 fahrenheit single response maximum operating temp, 3a 1st end thread class, poppet flow control device, spring disk loading method, 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 Direction: right-hand 1st end
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: 280.0 fahrenheit single response
Connection Style: plain (tube) 1st end
Valve Operation Method: automatic
Connection Type: threaded external tube 1st end
Adjustable Pressure Range: +0.5 to 2.5 pounds per square inch
Maximum Operating Pressure: 200.0 pounds per square inch single response
Nominal Thread Size: 0.437 inches 1st end
Opening Pressure Setting: 1.0 pounds per square inch
Nominal Outside Diameter Tube Accommodated: 0.250 inches 1st end
Material: steel comp 303 overall
Material Document And Classification: 66 fed std single material response overall
Media For Which Designed: air 1st response
Media For Which Designed: fuel/oil, hydrocarbon 2nd response
Media For Which Designed: helium 3rd response
Media For Which Designed: hydrogen 4th response
Media For Which Designed: nitrogen, gaseous 5th response
Style Designator: straight thru
Thread Series Designator: unjf 1st end
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
D559T-4D-1	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-208-7109?

The FSCG of the NSN 4820-00-208-7109 is 4820

Does the NSN 4820-00-208-7109 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-208-7109 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 4820-00-208-7109 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-208-7109 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 4820-00-208-7109 was assigned to the Federal Catalog?

It was assigned 53 years ago, on Sun, Apr 15, 1973