The Valve,bleeder,hydraulic System, cataloged under National Stock Number 4820-00-142-3161, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-142-3161 |
| Item Name | Valve,bleeder,hydraulic System |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | NEEDLE |
| Connection Style | FLARED (TUBE) SECOND ENDUNABLE TO DECODE |
| Connection Style | PLAIN (PIPE) FIRST ENDUNABLE TO DECODE |
| Connection Type | THREADED EXTERNAL PIPE FIRST ENDUNABLE TO DECODE |
| Connection Type | THREADED EXTERNAL TUBE SECOND ENDUNABLE TO DECODE |
| Style Designator | ANGLE |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDSUNABLE TO DECODE |
| Nominal Thread Size | 0.375 INCHES SECOND ENDUNABLE TO DECODE IN |
| Nominal Thread Size | 0.375 INCHES SECOND END IN |
| Nominal Thread Size | 0.125 INCHES FIRST END IN |
| Nominal Thread Size | 0.125 INCHES FIRST ENDUNABLE TO DECODE IN |
| Seat Angle | 37.0 DEGREES SECOND ENDUNABLE TO DECODE |
| Seat Angle | 37.0 DEGREES SECOND END |
| Maximum Operating Temp | 180.0 FAHRENHEIT SINGLE RESPONSEUNABLE TO DECODE DEGF |
| Surface Treatment | CADMIUM |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SECOND RESPONSE |
| Media for Which Designed | AIR FIRST RESPONSE |
| Media for Which Designed | AIR FIRST RESPONSEUNABLE TO DECODE |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SECOND RESPONSEUNABLE TO DECODE |
| Thread Class | 2A SECOND ENDUNABLE TO DECODE A |
| Unable to Decode | UNABLE TO DECODEUNABLE TO DECODE |
| Material | STEEL BODY |
| Material | STEEL SEAT |
| Material | COPPER ALLOY FLOW CONTROL DEVICEUNABLE TO DECODE |
| Material | COPPER ALLOY STEMUNABLE TO DECODE |
| Thread Series Designator | NPT FIRST END |
| Thread Series Designator | UNF SECOND END |
| Thread Series Designator | NPT FIRST ENDUNABLE TO DECODE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 152 | 5/9 Secondary reference U.S. Government activity |
| 5352CT3S | 3/2 Design control — primary reference U.S. Government activity |
| 5352CT3S | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| 5352CT3S | 5/9 Secondary reference U.S. Government activity |
| 11-2353-3 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-142-3161 is a Valve,bleeder,hydraulic System, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-142-3161: Flow Control Device: NEEDLE; Connection Style: FLARED (TUBE) SECOND ENDUNABLE TO DECODE; Connection Style: PLAIN (PIPE) FIRST ENDUNABLE TO DECODE; Connection Type: THREADED EXTERNAL PIPE FIRST ENDUNABLE TO DECODE. 30 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.