The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-220-6636, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-220-6636 |
| Primary Part Number | 5548715 |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Body Style | SINGLE CONNECTION, STRAIGHT FLOW |
| End Connection Quantity | 1 |
| Temp Adjustability | NOT ADJUSTABLE |
| Material | ALUMINUM BODY |
| Media for Which Designed | WATER, SALT |
| 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 |
|---|---|
| 5548715 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| M1287 | 5/9 Secondary reference U. S. Dynamics Corporation |
NSN 4820-01-220-6636 is a Valve,vacuum Breaking, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-220-6636 has 1 manufacturer part number on file: 5548715 (Naval Sea Systems Command).
Key specifications for 5548715: Body Style: SINGLE CONNECTION, STRAIGHT FLOW; End Connection Quantity: 1; Temp Adjustability: NOT ADJUSTABLE; Material: ALUMINUM BODY. 5 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.