4820-00-186-6568

Find complete technical information, availability, and procurement data for: 4820-00-186-6568
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-186-6568

Item Name Code

20520

Assigment Date

03/16/1973 (53 years ago)

A length of tubing, straight, or prebent to a predetermined angle, with added component(s) that forms an end connection on one or both ends. For flexible tube assemblies, see hose assembly (as modified). For items having perforations in the tubing or attachments, see tube assembly, fire extinguishing system. Excludes:items having integral preformed or plain ends, tube, bent (as modified), and items which are branched or forked.

3a 1st end thread class, automatic valve operation method, poppet flow control device, flareless 1st end connection style, right-hand 1st end thread direction

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 1st end
Thread Direction: right-hand 1st end
Flow Control Device: poppet
Connection Style: flareless 1st end
Valve Operation Method: automatic
Connection Type: threaded external tube 1st end
Mounting Position: horizontal or vertical
Thread Quantity Per Inch: 20 1st end
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.437 inches 1st end
Seat Angle: 12.0 degrees 1st end
Nominal Outside Diameter Tube Accommodated: 0.250 inches 1st end
Media For Which Designed: hydraulic fluid, mineral base single response
Style Designator: straight thru
Thread Series Designator: unjf 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
7204-066	Restrictor Check Valve
7231499	Restrictor Check Valve
91598-1	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-186-6568?

The FSCG of the NSN 4820-00-186-6568 is 4820

Does NSN 4820-00-186-6568 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 4820-00-186-6568 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-186-6568 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 4820-00-186-6568 was assigned to the Federal Catalog?

It was assigned 53 years ago, on Fri, Mar 16, 1973