The Valve,bleeder,hydraulic System, cataloged under National Stock Number 4820-01-300-2978, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-300-2978 |
| Primary Part Number | 1FA01118-1 |
| Item Name | Valve,bleeder,hydraulic System |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport |
| Status | ACTIVE |
| Flow Control Device | PLUG |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS |
| Connection Type | THREADED EXTERNAL BOSS ALL ENDS |
| Style Designator | ANGLE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.562 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Maximum Operating Temp | 149.0 CELSIUS SINGLE RESPONSE DEGC |
| Media for Which Designed | REFRIGERANT 114 SINGLE RESPONSE |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 18 ALL ENDS |
| Material | ALUMINUM BODY |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) ALL ENDS |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 1FA01118-1 PRIMARY | Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport (USA) |
| GV500AAR1 | Northrop Grumman Systems Corporation (USA) |
NSN 4820-01-300-2978 is a Valve,bleeder,hydraulic System, manufactured by Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-300-2978 has 2 manufacturer part numbers on file: 1FA01118-1 (Triumph Actuation Systems, Llc Div Triumph Actuation Systems - Freeport), GV500AAR1 (Northrop Grumman Systems Corporation).
Key specifications for 1FA01118-1: Flow Control Device: PLUG; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS; Connection Type: THREADED EXTERNAL BOSS ALL ENDS; Style Designator: ANGLE. 15 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.