The Valve,pressure Equalizing,gaseou, cataloged under National Stock Number 4820-01-475-1344, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-475-1344 |
| Item Name | Valve,pressure Equalizing,gaseou |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| First End Thread Series Designator | UNS |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | -40.0 FAHRENHEIT AND 180.0 FAHRENHEIT LOCATION NOT OTHERWISE SPECIFIED DEGF |
| Surface Treatment Document and Classification | MIL-A-8625, TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE |
| Surface Treatment Document and Classification | MIL-A-8625, TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Body Style | SINGLE CONNECTION, STRAIGHT FLOW |
| First End Thread Class | 2A A |
| First End Style Designator | EXTERNAL SEAT FOR GASKET SEAL |
| End Connection Quantity | 1 |
| Operating Pressure | 5.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Valve Venting Design Type | ATMOSPHERIC |
| Opening Pressure Setting | ERR-060 |
| Disk Loading Method | SPRING |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Surface Treatment | ANODIZE OUTSIDE |
| First End Outside Diameter Tube Accommodated | 0.875 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY STEM |
| Material | ALUMINUM ALLOY BODY |
| Media for Which Designed | AIR |
| Valve Relief Design Type | PRESSURE AND VACUUM |
| First End Nominal Thread Size | 0.875 INCHES IN |
| 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 |
|---|---|
| 790-RPV-5.0-5.0 | 3/2 Design control — primary reference U.S. Government activity |
| 790-RPV-5.0,5.OP | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-01-475-1344 is a Valve,pressure Equalizing,gaseou, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6615-01-701-6588. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-475-1344: Flow Control Device: POPPET; First End Thread Series Designator: UNS; First End Thread Direction: RIGHT-HAND; Temp Rating: -40.0 FAHRENHEIT AND 180.0 FAHRENHEIT LOCATION NOT OTHERWISE SPECIFIED DEGF. 22 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.