The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-056-2521, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-056-2521 |
| Primary Part Number | 1559679 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | CANCELLED |
| End Connection Quantity | 2 |
| Body Style | ANGLE |
| Media for Which Designed | AIR AND NITROGEN, GASEOUS |
| First End Style Designator | GASKET SEAL |
| Filter | NOT INCLUDED |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING |
| Temp Rating | 55.0 CELSIUS MAXIMUM DEGC |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE |
| Valve Loading Method | BELLOWS |
| Second End Relationship with First End | IDENTICAL |
| Thread Size and Series/type Designator | 0.438-20 UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END |
| Flow Control Device | DISK |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| Surface Treatment | ANODIZE OUTSIDE |
| Material | ALUMINUM ALLOY 2024 BODY |
| First End Thread Class | 3A A |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 260V003 | Mark Avitron, Inc. Dba Mark Avitron Inc (USA) |
| 1559679 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| A60246 PRIMARY | Hydro-Aire Aerospace Corp (USA) |
| 62A5A217 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 87353 | Ricoh Americas Corporation (USA) |
| 62A5A217-1 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 60246 | Hydro-Aire Aerospace Corp (USA) |
NSN 4820-00-056-2521 is a Valve,regulating,fluid Pressure, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-056-2521 has 7 cross-referenced part numbers: 260V003 (Mark Avitron, Inc. Dba Mark Avitron Inc), 1559679 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), A60246 (Hydro-Aire Aerospace Corp), 62A5A217 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 87353 (Ricoh Americas Corporation) and 2 more.
There are 9 known substitutes for 4820-00-056-2521: 9540-00-145-7424, 9540-00-145-7426, 5815-00-701-9021 and 6 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1559679: End Connection Quantity: 2; Body Style: ANGLE; Media for Which Designed: AIR AND NITROGEN, GASEOUS; First End Style Designator: GASKET SEAL. 16 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-056-2521 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.