NSN 4820-00-605-2569 Repair Services

Safety Relief Valve Overhaul, Repair, and Maintenance

MPN: 581R397H01, 5173A4TT100

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4820-00-605-2569 safety relief valve
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NSN 4820006052569


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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 4820-00-605-2569 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 4820-00-605-2569 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4820-00-605-2569
Categorization Safety or relief valves
Repairability Code

Approximate Weight 0.0lb
Thread Class 3a 1st end
Thread Direction Right-hand 1st end
Flow Control Device Poppet
Disk Loading Method Spring
Connection Style Flared (tube) 1st end
Connection Type Threaded external tube 1st end
Adjustable Pressure Range +80.0/+120.0 pounds per square inch
Opening Pressure Setting 100.0 pounds per square inch
Outside Diameter Tube Accommodated 0.250 inches 1st end
Surface Treatment Anodize
Surface Treatment Specification Mil-a-8625, type 1 military specification single treatment response

Part Numbers

Part Number Company RNAAC (Repair Depot)
581R397H01 NORTHROP GRUMMAN SYSTEMS CORPORATION SB - 645 MSSQ/MSIAPCS
5173A4TT100 CIRCOR AEROSPACE, INC. SB - 645 MSSQ/MSIAPCS