NSN 4820-00-574-5643 Repair Services

Restrictor Check Valve Overhaul, Repair, and Maintenance

MPN: A51H9221-3, 6125-4

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4820-00-574-5643 restrictor check valve
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NSN 4820005745643


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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 4820-00-574-5643 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 4820-00-574-5643 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4820-00-574-5643
Categorization Check valves of materials other than copper, iron or steel
Repairability Code

Approximate Weight 0.0lb
Thread Class 3b 1st end
Thread Direction Right-hand 1st end
Flow Control Device Poppet
Disk Loading Method Spring
Connection Style Gasket seal (boss) 1st end
Valve Operation Method Automatic
Connection Type Threaded internal boss 1st end
Mounting Position Horizontal or vertical
Thready Qty Per Inch (tpi) 18 1st end
Maximum Operating Pressure 3000.0 pounds per square inch single response
Thread Size 0.562 inches 1st end
Outside Diameter Tube Accommodated 0.375 inches 1st end
Material Aluminum alloy
Media For Which Designed Oil, hydraulic single response
Style Designator Straight thru
Test Data Document 26512-a51dcvbh027 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Thread Series Designator Unjf 1st end

Part Numbers

Part Number Company RNAAC (Repair Depot)
A51H9221-3 NORTHROP GRUMMAN SYSTEMS CORPORATION KE - NAVAL ICP
6125-4 PNEUDRAULICS, INC. KE - NAVAL ICP
A51H9221-3 NORTHROP GRUMMAN SYSTEMS CORPORATION KE - NAVAL ICP