NSN 4820-00-283-6956 Repair Services

Restrictor Check Valve Overhaul, Repair, and Maintenance

MPN: 4R122-127, 6F2966-127, 749959-127

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4820-00-283-6956 restrictor check valve
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NSN 4820002836956


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AS9120B:2015 ISO 9001 Audited and Certified

FAA and EASA Part 145 Certified Repair Stations Ensuring the highest standards of quality and compliance for our clients' needs.

We specialize in the repair and refurbishment of nsn components. From mechanical assemblies to rotor blades, our comprehensive capabilities cover a wide range of NSN parts, providing cost effective solutions to extend the operational life of vital equipment.

NSN 4820-00-283-6956 has been designated as a repairable item and has been included in our capabilities catalog. If you require overhaul or repair services use the form on this page to send us your information. We will provide you with a lead time and price quote.

Repairability and Datasheet

NSN 4820-00-283-6956 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4820-00-283-6956
Categorization Check valves of steel
Repairability Code

Approximate Weight 0.0lb
Thread Class 3a all ends
Thread Direction Right-hand all ends
Flow Control Device Poppet
Disk Loading Method Spring
Maximum Operating Temp 250.0 degrees fahrenheit 2nd response
Connection Style Flareless all ends
Valve Operation Method Automatic
Connection Type Threaded external tube all ends
Mounting Position Horizontal or vertical
Maximum Operating Pressure 3000.0 pounds per square inch single response
Thread Size 0.562 inches 1st end
Seat Angle 12.0 degrees all ends
Material Steel comp 630
Media For Which Designed Hydraulic fluid, phosphate-ester base 1st response
Surface Treatment Passivate
Style Designator Straight thru
Thread Series Designator Unjf all ends

Part Numbers

Part Number Company RNAAC (Repair Depot)
4R122-127 ALLEN AIRCRAFT PRODUCTS INC KE - NAVAL ICP
6F2966-127 CRISSAIR, INC. KE - NAVAL ICP
749959-127 LOCKHEED MARTIN CORPORATION ZZ - USA