Restrictor Check Valve
(NSN) National Stock Number
4820-00-824-1271
Federal Supply Classification
4820 Nonpowered Valves
Item Name Code
20520
Schedule B Code
8481309000
Summary
3a all ends thread class, right-hand all ends thread direction, 0.003 inches nominal aperture diameter, poppet flow control device, spring disk loading method, 275.0 deg fahrenheit single response maximum operating temp
| DAC | HCC | DMIL | RNCC |
|---|---|---|---|
| 1 | - | - | 7 |
| RNVC | SADC | MSDS | RNAAC |
|---|---|---|---|
| 2 | - | - | KE |
Identification
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.
| INC | FIIG | Concept | Condition |
|---|---|---|---|
| 20520 | A530B0 | 1 | 1 |
Specifications
Thread Class
3a all ends
Details
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.Thread Direction
right-hand all ends
Details
The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.Aperture Diameter
0.003 inches nominal
Details
The length of a straight line which passes through the center of an aperture,and terminates at the circumference.Flow Control Device
poppet
Details
The part that controls the flow through the item.Disk Loading Method
spring
Details
The means of closing the item when inlet pressure decreases.Maximum Operating Temp
275.0 deg fahrenheit single response
Details
The maximum temperature at which the item is rated to operate for an extended period of time.Connection Style
flareless all ends
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.Valve Operation Method
automatic
Details
The means used to control the operation of the valve.Connection Type
threaded external tube all ends
Details
Indicates the type of connection/s/.Mounting Position
horizontal or vertical
Details
The installed position for which the item is designed.Thread Quantity Per Inch
20 1st end
Details
The number of threads on the item per linear inch measured on a line parallel to the thread axis.Maximum Operating Pressure
3000.0 pounds per square inch single response
Details
The maximum pressure at which the item is rated for operation.Nominal Thread Size
0.437 inches all ends
Details
A designation that is used for the purpose of general identification of the thread.Seat Angle
12.0 degrees all ends
Details
The angle of the end surface upon which the mated surface seats.Nominal Outside Diameter Tube Accommodated
0.250 inches all ends
Details
The nominal length of a straight line which passes through the center of the accommodated tube,and terminates at the outside circumference.Material
aluminum alloy 2024 body
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Material
rubber synthetic packing
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Material
steel corrosion resisting flow control device and steel comp 303 flow control device and steel comp 304 flow control device
Details
The chemical compound or mechanical mixture properties of which the item is fabricated.Material Document And Classification
fed-std-66, aisi 302/sae 30302 fed std 1st material response flow control device and fed-std-66, aisi 303/sae 30303 fed spec 2nd material response flow control device and fed-std-66, aisi 304/sae 30304 fed spec 3rd material response flow control device
Details
The specification, standard, or manufacturer's reference and the classification designation, such as class, condition, temper, and the like, that identifies the material.Material Document And Classification
qq-a-225/6, alloy 2024 fed spec single material response body
Details
The specification, standard, or manufacturer's reference and the classification designation, such as class, condition, temper, and the like, that identifies the material.Media For Which Designed
hydraulic fluid, phosphate-ester base single response
Details
The type of media for which the item is designed.Surface Treatment
anodize
Details
The metallic,nonmetallic,and/or chemical properties with which the item is plated,dipped,and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.Surface Treatment Document And Classification
mil-a-8625,ty 2 mil spec single treatment response
Details
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.Style Designator
straight thru
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.Thread Series Designator
unf all ends
Details
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.Master-Cross Reference List
| Part | CAGE | DAC | HCC | RNCC | RNVC | MSDS | RNAAC |
|---|---|---|---|---|---|---|---|
| 1R0448-3 | 26044 | 1 | - | 3 | 2 | - | KE |
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
| HMIC | PMIC | ESD/EMI | Criticality |
|---|---|---|---|
| N | U | - | - |
Freight
Universal / National Freight and Handling Information
| UFC | HMC | LTL | LCL |
|---|---|---|---|
| 29300 | - | W | - |
| RVC | WCC | TCC | SHC |
|---|---|---|---|
| - | 576 | Z | 9 |
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FAQs
Frequently asked questions for NSN 4820-00-824-1271
What is the NIIN of the NSN 4820-00-824-1271?
The National Item Identification Number (NIIN) of the NSN 4820-00-824-1271 is 00-824-1271
When the NSN 4820-00-824-1271 was assigned to the Federal Catalog?
It was assigned 57 years ago, on Wed, Aug 16, 1967
Does the NSN 4820-00-824-1271 contain any precious metals?
Type/content is unknown
Does the NSN 4820-00-824-1271 contain any hazardous material?
No data in HMIRS
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