4820-01-257-4405

Find complete technical information, availability, and procurement data for: 4820-01-257-4405
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-257-4405

Item Name Code

05487

Assigment Date

06/19/1987 (39 years ago)

A valve designed to relieve internal pressure from gear housings, automotive axles, differentials, transmissions and the like. May or may not be threaded on one end. For items with relief pressure ratings see valve (1), safety relief.

right-hand all ends thread direction, plain (pipe) 1st end connection style, 200.0 fahrenheit single response maximum operating temp, plain, optional end (pipe) 2nd end connection style, 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.

Thread Direction: right-hand all ends
Flow Control Device: poppet
Maximum Operating Temp: 200.0 fahrenheit single response
Connection Style: plain (pipe) 1st end
Connection Style: plain, optional end (pipe) 2nd end
Valve Operation Method: automatic
Connection Type: threaded external pipe 1st end
Connection Type: threaded internal pipe 2nd end
Mounting Position: horizontal
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.500 inches all ends
Material: copper alloy body
Material: rubber butadiene-acrylonitrile class nbr seat
Material: steel comp 304 flow control device
Media For Which Designed: air 1st response
Media For Which Designed: hydraulic fluid, mineral base 2nd response
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
482-1/2B1-2	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-257-4405?

The FSCG of the NSN 4820-01-257-4405 is 4820

Does the NSN 4820-01-257-4405 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-01-257-4405 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 4820-01-257-4405 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-257-4405 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 4820-01-257-4405 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Fri, Jun 19, 1987