The Valve,pressure Equalizing,gaseou, cataloged under National Stock Number 4820-01-078-4788, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-078-4788 |
| Primary Part Number | 1853332 |
| Item Name | Valve,pressure Equalizing,gaseou |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Flow Control Device | NEEDLE |
| First End Thread Series Designator | UNEF |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | NOT IDENTICAL |
| First End Thread Pitch Diameters | +0.5976 TO 0.5978 INCHES IN |
| Body Style | STRAIGHT THRU |
| First End Style Designator | FLARED |
| End Connection Quantity | 2 |
| Operating Pressure | 45.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Second End Outside Diameter Hose Accommodated | 0.250 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN |
| Second End Style Designator | HOSE SOCKET |
| Valve Venting Design Type | ATMOSPHERIC |
| First End Connection Type | THREADED EXTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.500 INCHES NOMINAL IN |
| First End Thread Tolerance Class | 3A EXTERNAL A |
| Material | STEEL BODY |
| Media for Which Designed | GAS |
| Second End Connection Type | UNTHREADED INTERNAL HOSE |
| Valve Relief Design Type | PRESSURE AND VACUUM |
| First End Nominal Thread Size | 0.625 INCHES IN |
| Second End Inside Diameter Hose Accommodated | 0.250 INCHES NOMINAL IN |
| 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 |
|---|---|
| 1853332 PRIMARY | Northrop Grumman Systems Corporation (USA) |
NSN 4820-01-078-4788 is a Valve,pressure Equalizing,gaseou, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-078-4788 has 1 manufacturer part number on file: 1853332 (Northrop Grumman Systems Corporation).
Key specifications for 1853332: Flow Control Device: NEEDLE; First End Thread Series Designator: UNEF; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: NOT IDENTICAL. 21 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.