The Valve,safety Relief, cataloged under National Stock Number 4820-00-405-4169, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Circor Aerospace, Inc. Dba Circor Aerospace Inc. Government technical data includes 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-405-4169 |
| Primary Part Number | 559A-1M-40 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Circor Aerospace, Inc. Dba Circor Aerospace Inc |
| Status | CANCELLED |
| Connection Style | PLAIN (PIPE) FIRST END |
| Valve Operation Method | AUTOMATIC |
| Thread Series Designator | NPT FIRST END |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Opening Pressure Setting | 40.0 POUNDS PER SQUARE INCH LBS |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Material Document and Classification | QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Maximum Operating Temp | 250.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Maximum Operating Temp | -40.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Flow Control Device | POPPET |
| Media for Which Designed | REFRIGERANT 12 FOURTH RESPONSE |
| Media for Which Designed | AIR FIRST RESPONSE |
| Style Designator | STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY. |
| Surface Treatment | ANODIZE LOCATION NOT OTHERWISE SPECIFIED |
| Media for Which Designed | ACETYLENE SECOND RESPONSE |
| Disk Loading Method | SPRING |
| Nominal Thread Size | 0.125 INCHES FIRST END IN |
| Nominal Pipe Size Accommodated | 0.125 INCHES FIRST END IN |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Media for Which Designed | AMMONIA, GASEOUS THIRD RESPONSE |
| Thread Direction | RIGHT-HAND FIRST END |
| Media for Which Designed | HYDROGEN FIFTH RESPONSE |
| Adjustable Pressure Range | +25.0 TO 75.0 POUNDS PER SQUARE INCH LBS |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 559A-1M-40 PRIMARY | Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA) |
| 2271439PC2 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 1093438 | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| 1093438PC2 | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| 15640-1 | Edo (USA) |
NSN 4820-00-405-4169 is a Valve,safety Relief, manufactured by Circor Aerospace, Inc. Dba Circor Aerospace Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-405-4169 has 5 cross-referenced part numbers: 559A-1M-40 (Circor Aerospace, Inc. Dba Circor Aerospace Inc), 2271439PC2 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 1093438 (Lockheed Martin Corporation Div Rms - Mitchel Field), 1093438PC2 (Lockheed Martin Corporation Div Rms - Mitchel Field), 15640-1 (Edo).
There are 5 known substitutes for 4820-00-405-4169: 5950-00-135-3907, 5315-00-171-4350, 5331-00-691-8143 and 2 more. Verify interchangeability with system specifications before substitution.
Key specifications for 559A-1M-40: Connection Style: PLAIN (PIPE) FIRST END; Valve Operation Method: AUTOMATIC; Thread Series Designator: NPT FIRST END; Operating Pressure: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 24 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-405-4169 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.