The Valve,vacuum Breaking, cataloged under National Stock Number 4820-00-467-3170, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-467-3170 |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| First End Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) |
| Second End Seat Angle in Deg | 37.0 |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 135.0 FAHRENHEIT DEGF |
| Second End Nominal Thread Size | 0.438 INCHES IN |
| Second End Relationship with First End | NOT IDENTICAL |
| Second End Thread Class | 3A A |
| First End Seat Angle in Deg | 37.0 |
| First End Thread Class | 3A A |
| First End Style Designator | FLARED |
| Second End Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) |
| End Connection Quantity | 2 |
| Second End Thread Direction | RIGHT-HAND |
| Second End Style Designator | FLARED |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Temp Adjustability | NOT ADJUSTABLE |
| First End Outside Diameter Tube Accommodated | 0.375 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY BODY |
| Material | PLASTIC POLYAMIDE NYLON FLOW CONTROL DEVICE |
| Media for Which Designed | AIR OR HYDROCARBON FUELS AND OILS |
| Second End Connection Type | THREADED EXTERNAL TUBE |
| First End Nominal Thread Size | 0.562 INCHES IN |
| Second End Outside Diameter Tube 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 |
| Reference | Meaning |
|---|---|
| 2720042 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-467-3170 is a Valve,vacuum Breaking, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-467-3170: Flow Control Device: POPPET; First End Thread Series Designator: UNIFIED NATIONAL JOINT (UNJ); Second End Seat Angle in Deg: 37.0; First End Thread Direction: RIGHT-HAND. 24 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.