D559T-8D-75

View detailed technical data, stock status, and sourcing information for: D559T-8D-75
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-377-3962

Item Name Code

05488

Assigment Date

07/15/1993 (33 years ago)

A replaceable item designed to provide a stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see insert, engine valve seat.

3a all ends thread class, inside screw bonnet type, right-hand all ends thread direction, poppet flow control device, threaded bonnet attachment method

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 all ends
Thread Direction: right-hand all ends
Flow Control Device: poppet
Bonnet Type: inside screw
Bonnet Attachment Method: threaded
Maximum Operating Temp: 280.0 fahrenheit single response
Connection Style: external seat for gasket seal (boss) all ends
Valve Operation Method: automatic
Connection Type: threaded external boss all ends
Thread Quantity Per Inch: 16 all ends
Maximum Operating Pressure: 200.0 pounds per square inch single response
Nominal Thread Size: 0.750 inches all ends
Seat Angle: 37.0 degrees all ends
Opening Pressure Setting: 75.0 pounds per square inch
Material: steel corrosion resisting body
Media For Which Designed: air 1st response
Media For Which Designed: fuel/oil, hydrocarbon 2nd response
Style Designator: straight thru
Thread Series Designator: unj all ends

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
6381608	Safety Relief Valve
D559T-8D-75	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-377-3962?

The FSCG of the NSN 4820-01-377-3962 is 4820

Does the NSN 4820-01-377-3962 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-377-3962 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 4820-01-377-3962 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-377-3962 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 4820-01-377-3962 was assigned to the Federal Catalog?

It was assigned 33 years ago, on Thu, Jul 15, 1993