Restrictor Check Valve
1139387
(NSN) National Stock Number
4820-00-032-8391
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, 0.055 inches nominal aperture diameter, cone flow control device, flared (tube) 1st end connection style, threaded external tube 1st end connection type
| DAC | HCC | DMIL | RNCC |
|---|---|---|---|
| 5 | - | - | 5 |
| RNVC | SADC | MSDS | RNAAC |
|---|---|---|---|
| 9 | - | - | MB |
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
0.055 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
cone
Details
The part that controls the flow through the item.Connection Style
flared (tube) 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/.Thread Quantity Per Inch
18 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
1500.0 pounds per square inch single response
Details
The maximum pressure at which the item is rated for operation.Nominal Thread Size
0.750 inches 1st end
Details
A designation that is used for the purpose of general identification of the thread.Seat Angle
37.0 degrees 1st end
Details
The angle of the end surface upon which the mated surface seats.Nominal Outside Diameter Tube Accommodated
0.500 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.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, mineral base single response
Details
The type of media for which the item is designed.Style Designator
straight thru
Details
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.Thread Series Designator
un 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 |
|---|---|---|---|---|---|---|---|
| 402681-3 | 59364 | 5 | - | 3 | 2 | - | ZZ |
| 1139387 | 88277 | 5 | - | 5 | 2 | - | MB |
| GU8-2-2-8DR046 | 24930 | 5 | - | 5 | 9 | - | MB |
| 402681-3 | 77068 | 5 | - | 3 | 9 | - | MB |
| 36020 | 80107 | 5 | - | 5 | 9 | - | MB |
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 |
|---|---|---|---|
| 64490 | - | P | P |
| RVC | WCC | TCC | SHC |
|---|---|---|---|
| - | 594 | Z | Z |
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Manufacturer
FAQs
Frequently asked questions for NSN 4820-00-032-8391
What is the NIIN of the NSN 4820-00-032-8391?
The National Item Identification Number (NIIN) of the NSN 4820-00-032-8391 is 00-032-8391
When the NSN 4820-00-032-8391 was assigned to the Federal Catalog?
It was assigned 61 years ago, on Tue, Jan 1, 1963
Does the NSN 4820-00-032-8391 contain any precious metals?
Type/content is unknown
Does the NSN 4820-00-032-8391 contain any hazardous material?
No data in HMIRS
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