Restrictor Check Valve NSN 4820-00-845-3990

Item Description

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.

NSN: 4820-00-845-3990

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Features and Characteristics

Thread Class

3b 1st end

Thread Direction

Right-hand 1st end

Flow Control Device

Poppet

Disk Loading Method

Spring

Connection Style

Flared (tube) 2nd end

Connection Type

Threaded internal tube 1st end

Mounting Position

Horizontal

Thready Qty Per Inch (tpi)

20 2nd end

Maximum Operating Pressure

3000.0 pounds per square inch single response

Thread Size

0.438 inches 2nd end

Seat Angle

37.0 degrees 2nd end

Outside Diameter Tube Accommodated

0.250 inches 2nd end

Special Features

2.730 in. Lg over-all, 0.875 in. Across flats

Material

Steel comp 303 flow control device

Media For Which Designed

Fuel/oil, hydrocarbon single response

Surface Treatment

Anodize

Surface Treatment Specification

Mil-a-8625, type 2 military specification single treatment response

Style Designator

Straight thru

Thread Series Designator

Unf 2nd end

FSC

4820 Nonpowered Valves

NIIN

008453990

NSN

4820008453990

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

1R3049-79

Cage Code:

26044

Status:

MSDS:

Part Number:

32-69004-79

Cage Code:

76301

Status:

MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov

Schedule B Number: 8481309000
NAICS: 332911
SITC: 74730
Description: Check valves of materials other than copper, iron or steel
End Use (Code 21180):
Industrial machines, other

Q & A

Frequently asked questions for NSN 4820-00-845-3990

What are the manufacturers of nsn 4820008453990?

Saf Industries Llc (26044)
Boeing Company, The (76301)

Does this nsn 4820008453990 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 4820008453990
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.

Does nsn 4820008453990 contain any precious metals?
Precious metal content is unknown.

Does nsn 4820008453990 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 4820008453990?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)

INC

FIIG

App. Key

Cond. Code

Status

INC:

20520

FIIG:

A530B0

App. Key:

Cond. Code:

Status:

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On Time Delivery
Certificate of Conformance
Quality Inspected Parts
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