NSN 4820-00-283-1181
Restrictor Valve
About this product
Poppet flow control device, flareless 2nd end connection style, automatic valve operation method, connection type: threaded external tube 2nd end.
Manufacturer part number 4R121-123 for national stock number 4820002831181.
Datasheet
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Product description
Restrictor Check Valve NSN 4820-00-283-1181.
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MPN or Model
4R121-123
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NMF (National Motor Freight)
051080 - Faucets, Bibcocks, Gates Valves -
Unit Weight (Est.)
0.3 lb -
Thread Class
3a 1st end -
Thread Direction
Right-hand 1st end -
Flow Control Device
Poppet -
Connection Style
Flareless 2nd end -
Valve Operation Method
Automatic -
Connection Type
Threaded external tube 2nd end -
Thready Qty Per Inch (tpi)
20 2nd end -
Maximum Operating Pressure
3000.0 pounds per square inch single response -
Thread Size
0.562 inches 1st end -
Seat Angle
12.0 degrees 2nd end -
Outside Diameter Tube Accommodated
0.375 inches 1st end -
Media For Which Designed
Hydraulic fluid, phosphate-ester base single response -
Surface Treatment
Passivate -
Style Designator
Straight thru -
Thread Series Designator
Unjf 1st end
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Restrictor Check Valve
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.
![Mechanic Bill explains Restrictor Valve](/public/images/billy-thinking.png)
Pricing and Availability
Get a quote for 4820-00-283-1181 restrictor check valveManufacturer Part Numbers and Alternates
MPN manufacturer part number | Registrant or Supplier |
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4R121-123 | Allen Aircraft Products Inc |
6F2962-123 | Crissair, Inc. |
749831-123 | Lockheed Martin Corporation |
Stock Check
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