The Valve,safety Relief, cataloged under National Stock Number 4820-00-697-0994, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is The Boeing Company. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-697-0994 |
| Primary Part Number | 4255605 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | The Boeing Company |
| Status | CANCELLED |
| Thread Quantity Per Inch | 18 FIRST END |
| Adjustable Pressure Range | +3000.0 TO 4500.0 POUNDS PER SQUARE INCH LBS |
| Disk Loading Method | SPRING |
| Material | STEEL CORROSION RESISTING SEAT |
| Connection Style | GASKET SEAL(BOSS) FIRST END |
| Thread Direction | RIGHT-HAND FIRST END |
| Material | STEEL CORROSION RESISTING STEM |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES FIRST END IN |
| Style Designator | CROSS W/OFFSET |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Thread Series Designator | UNF FIRST END |
| Operating Pressure | 3250.0 POUNDS PER SQUARE INCH (PSI) NOMINAL POWER DRIVE LBS |
| Thread Class | 3B FIRST END |
| Material | ALUMINUM ALLOY BODY |
| Valve Discharge Flow Rate | 0.7 GALLONS PER MINUTE |
| Connection Type | THREADED INTERNAL BOSS FIRST END |
| Flow Control Device | PISTON |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 4255605 PRIMARY | The Boeing Company (USA) |
| 4263879-500 PRIMARY | The Boeing Company (USA) |
| 26089 PRIMARY | Hydro-Aire Aerospace Corp (USA) |
| 4255605 | The Boeing Company (USA) |
| 15048 | Hydro-Aire Aerospace Corp (USA) |
| 4263879-502 PRIMARY | The Boeing Company (USA) |
NSN 4820-00-697-0994 is a Valve,safety Relief, manufactured by The Boeing Company, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-697-0994 has 6 cross-referenced part numbers: 4255605 (The Boeing Company), 4263879-500 (The Boeing Company), 26089 (Hydro-Aire Aerospace Corp), 4255605 (The Boeing Company), 15048 (Hydro-Aire Aerospace Corp) and 1 more.
There are 12 known substitutes for 4820-00-697-0994: 5330-00-161-9681, 5133-00-189-9293, 5310-00-786-2497 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 4255605: Thread Quantity Per Inch: 18 FIRST END; Adjustable Pressure Range: +3000.0 TO 4500.0 POUNDS PER SQUARE INCH LBS; Disk Loading Method: SPRING; Material: STEEL CORROSION RESISTING SEAT. 18 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-697-0994 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.