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4820-00-080-3858

Restrictor Check Valve

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Official Item Classification

Name
Restrictor Check Valve
(NSN) National Stock Number
4820-00-080-3858
(FSG) Federal Supply Group
48 Valves
(FSC) Federal Supply Classification
4820 Nonpowered Valves
(INC) Item Name Code
20520
(FIIG) Federal Item Identification Guide
A530B0
Date
11/22/1972 (53 years ago)

3a 2nd end thread class, 1.250 inches nominal aperture diameter, 3b 1st end thread class, poppet flow control device, right-hand all ends thread direction

Specs & Compatibility

Thread Class

3a 2nd end

Thread Class

3b 1st end

Thread Direction

right-hand all ends

Aperture Diameter

1.250 inches nominal

Flow Control Device

poppet

Maximum Operating Temp

200.0 fahrenheit single response

Connection Style

external seat for gasket seal (boss) 2nd end

Connection Style

plain, optional end (pipe) 1st end

Valve Operation Method

automatic

Connection Type

threaded external boss 2nd end

Connection Type

threaded internal pipe 1st end

Mounting Position

horizontal or vertical

Thread Quantity Per Inch

16 2nd end

Maximum Operating Pressure

5000.0 pounds per square inch single response

Nominal Thread Size

0.500 inches 1st end

Nominal Thread Size

0.750 inches 2nd end

Material

copper alloy overall

Media For Which Designed

hydraulic fluid, mineral base single response

Style Designator

straight thru

Thread Series Designator

npt 1st end

Thread Series Designator

unj 2nd end

Regulatory Compliance

Precious Metals Indicator
U

Precious metal content is unknown

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0020520

Related Hardware Products

Part Number Description
1429-8SAE4GPM Restrictor Check Valve
FF3-NKP0-04S-4GPM Restrictor Check Valve

Frequently Asked Questions

What is the FSCG of the NSN 4820-00-080-3858?
The FSCG of the NSN 4820-00-080-3858 is 4820
Does the NSN 4820-00-080-3858 have a Schedule B code assigned?
Yes, the Schedule B code is 8481301090
Does NSN 4820-00-080-3858 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 4820-00-080-3858 contain precious materials?
Precious metal content is unknown
Does NSN 4820-00-080-3858 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 4820-00-080-3858 was assigned to the Federal Catalog?
It was assigned 53 years ago, on Wed, Nov 22, 1972