P66-673

View detailed technical data, stock status, and sourcing information for: P66-673
DODParts.com distributes related products varnishes dopes paints, aircraft parts and consumables, electrical parts, fittings and other components for the aerospace and defense industries. Submit the short price quote form for part P66-673 to receive an up to date pricing and availability quote by email.

Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-331-3537

Item Name Code

05488

Assigment Date

12/16/1973 (52 years ago)

0.250 inches 2nd end nominal pipe size accommodated, 0.250 inches 1st end nominal pipe size accommodated, right-hand 1st end thread direction, right-hand 2nd end thread direction, poppet flow control device

Product Characteristics

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

Nominal Pipe Size Accommodated: 0.250 inches 1st end
Nominal Pipe Size Accommodated: 0.250 inches 2nd end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: 250.0 fahrenheit single response
Connection Style: plain (pipe) 2nd end
Connection Style: plain,optional end(pipe) 1st end
Valve Operation Method: automatic
Connection Type: threaded external pipe 2nd end
Connection Type: threaded internal pipe 1st end
Thread Quantity Per Inch: 18 1st end
Thread Quantity Per Inch: 18 2nd end
Maximum Operating Pressure: 200.0 pounds per square inch single response
Nominal Thread Size: 0.250 inches 1st end
Nominal Thread Size: 0.250 inches 2nd end
Opening Pressure Setting: 20.0 pounds per square inch
Material: copper alloy body
Material: copper alloy seat
Material: steel corrosion resisting flow control device
Media For Which Designed: air 1st response
Media For Which Designed: fuel/oil, hydrocarbon 2nd response
Media For Which Designed: nitrogen, gaseous 3rd response
Style Designator: straight thru
Thread Series Designator: npt 2nd end
Thread Series Designator: npt 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
65A81C1037	Safety Relief Valve
P66-673	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-331-3537?

The FSCG of the NSN 4820-00-331-3537 is 4820

Does the NSN 4820-00-331-3537 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-331-3537 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 4820-00-331-3537 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-331-3537 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 4820-00-331-3537 was assigned to the Federal Catalog?

It was assigned 52 years ago, on Sun, Dec 16, 1973