4820-00-136-5042

Find complete technical information, availability, and procurement data for: 4820-00-136-5042
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-136-5042

Item Name Code

20520

Assigment Date

01/17/1969 (57 years ago)

A valve having an orifice in the poppet, disk, or the like, to permit restricted fluid flow when the valve is seated. It does not have a stem or provisions for pressure adjustments, and is similar to a valve, check with the exception of the orifice which permits fluid flow in more than one direction.

threaded renewable seat ring type, right-hand all ends thread direction, poppet flow control device, plain, optional end (pipe) all ends connection style, spring disk loading method

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
Disk Loading Method: spring
Renewable Seat Ring Type: threaded
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: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.500 inches all ends
Material: aluminum alloy body
Material: aluminum alloy flow control device
Material: steel seat
Media For Which Designed: hydraulic fluid, mineral base single response
Surface Treatment: anodize
Style Designator: straight thru
Thread Series Designator: nptf 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
194-4-12	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-136-5042?

The FSCG of the NSN 4820-00-136-5042 is 4820

Does the NSN 4820-00-136-5042 have a Schedule B code assigned?

Yes, the Schedule B code is 8481309000

Does NSN 4820-00-136-5042 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 4820-00-136-5042 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-136-5042 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 4820-00-136-5042 was assigned to the Federal Catalog?

It was assigned 57 years ago, on Fri, Jan 17, 1969