The Valve,safety Relief, cataloged under National Stock Number 4820-01-263-7852, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-263-7852 |
| Primary Part Number | 84000549 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Style Designator | DROP-IN CARTRIDGE |
| Disk Loading Method | SPRING |
| Opening Pressure Setting | 50.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 84000549 PRIMARY | The Boeing Company Div Defense (USA) |
| CAR2K141 | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| Reference | Meaning |
|---|---|
| 84000549 | 5/9 Secondary reference Textron Systems Corporation Dba Textron Systems Corp |
| 10342322 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| A-DS10-0-1-0-1 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division |
| 84000549 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-263-7852 is a Valve,safety Relief, manufactured by The Boeing Company Div Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-263-7852 has 2 manufacturer part numbers on file: 84000549 (The Boeing Company Div Defense), CAR2K141 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division).
Key specifications for 84000549: Flow Control Device: DISK; Style Designator: DROP-IN CARTRIDGE; Disk Loading Method: SPRING; End Item Identification: 4920-01-295-2727. 5 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.