Restrictor Check Valve
668067-5
(NSN) National Stock Number
4820-00-803-2548
Federal Supply Classification
4820 Nonpowered Valves
Item Name Code
20520
Schedule B Code
8481309000
Summary
3a 1st end thread class, right-hand 1st end thread direction, 0.187 inches nominal aperture diameter, poppet flow control device, spring disk loading method, flareless 1st end connection style
| DAC | HCC | DMIL | RNCC |
|---|---|---|---|
| 6 | - | - | 5 |
| RNVC | SADC | MSDS | RNAAC |
|---|---|---|---|
| 2 | - | - | ZZ |
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 1st end
Details
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.Thread Direction
right-hand 1st end
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
0.187 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.Connection Style
flareless 1st end
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.Connection Type
threaded external tube 1st end
Details
Indicates the type of connection/s/.Mounting Position
horizontal
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 1st end
Details
A designation that is used for the purpose of general identification of the thread.Seat Angle
24.0 degrees 1st end
Details
The angle of the end surface upon which the mated surface seats.Nominal Outside Diameter Tube Accommodated
0.250 inches 1st end
Details
The nominal length of a straight line which passes through the center of the accommodated tube,and terminates at the outside circumference.Special Features
over-all dim.,2.781 in. lg,1.000 in. across flats
Details
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification on one or more other functions.Material
aluminum alloy 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.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.Style Designator
angle
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.Thread Series Designator
unf 1st end
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 |
|---|---|---|---|---|---|---|---|
| 1R3444-15-25 | 26044 | 5 | - | 3 | 2 | - | SB |
| 1R3449-15-25 | 26044 | 5 | - | 5 | 2 | - | SB |
| 668374-1 | 98897 | 6 | - | 5 | 2 | - | ZZ |
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
| HMIC | PMIC | ESD/EMI | Criticality |
|---|---|---|---|
| N | A | - | - |
Freight
Universal / National Freight and Handling Information
| UFC | HMC | LTL | LCL |
|---|---|---|---|
| 29300 | - | W | - |
| RVC | WCC | TCC | SHC |
|---|---|---|---|
| - | 594 | Z | 9 |
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Manufacturer
LOCKHEED MARTIN CORP DIV LOCKHEED MARTIN AERONAUTICS COMPANY
CAGE: 98897
MARIETTA
, GA
, 30063-0001
UNITED STATES
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FAQs
Frequently asked questions for NSN 4820-00-803-2548
What is the NIIN of the NSN 4820-00-803-2548?
The National Item Identification Number (NIIN) of the NSN 4820-00-803-2548 is 00-803-2548
When the NSN 4820-00-803-2548 was assigned to the Federal Catalog?
It was assigned 62 years ago, on Mon, Jan 1, 1962
Does the NSN 4820-00-803-2548 contain any precious metals?
Does not contain precious metal
Does the NSN 4820-00-803-2548 contain any hazardous material?
No data in HMIRS
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