429-1/4Y2-6 AND

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-214-3779

Item Name Code

05487

Assigment Date

08/09/1985 (40 years ago)

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes:valve (1), relief, pressure and temperature.

-65.0 fahrenheit 1st response maximum operating temp, plain, optional end (pipe) all ends connection style, disk flow control device, right-hand all ends thread direction, 250.0 fahrenheit 2nd response maximum operating temp

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: disk
Maximum Operating Temp: -65.0 fahrenheit 1st response
Maximum Operating Temp: 250.0 fahrenheit 2nd response
Connection Style: plain, optional end (pipe) all ends
Valve Operation Method: automatic
Connection Type: threaded internal pipe all ends
Mounting Position: horizontal or vertical
Maximum Operating Pressure: 10000.0 pounds per square inch single response
Nominal Thread Size: 0.250 inches all ends
Opening Pressure Setting: 6.0 pounds per square inch
Material: rubber butadiene-acrylonitrile class nbr seat
Material: steel corrosion resisting body
Style Designator: straight thru
Thread Series Designator: npt 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
429-1/4Y2-6	Check Valve
429-1/4Y2-6 AND	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-214-3779?

The FSCG of the NSN 4820-01-214-3779 is 4820

Does the NSN 4820-01-214-3779 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-01-214-3779 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 4820-01-214-3779 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-214-3779 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 4820-01-214-3779 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Fri, Aug 9, 1985