The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-244-8379, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-244-8379 |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| First End Thread Direction | RIGHT-HAND |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 1,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE |
| Body Style | SINGLE CONNECTION, STRAIGHT FLOW |
| First End Thread Class | 3A A |
| End Connection Quantity | 1 |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Surface Treatment | ANODIZE OUTSIDE |
| First End Outside Diameter Tube Accommodated | 0.500 INCHES NOMINAL IN |
| Material | ALUMINUM BODY |
| Media for Which Designed | AIR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| A8866 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-244-8379 is a Valve,vacuum Breaking, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-244-8379: First End Thread Direction: RIGHT-HAND; Surface Treatment Document and Classification: MIL-A-8625,TYPE 1,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE; Body Style: SINGLE CONNECTION, STRAIGHT FLOW; First End Thread Class: 3A A. 10 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.
NSN 4820-01-244-8379 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.