The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-564-1719, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Davis Controls Corp. Government technical data includes 11 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 | 4820-01-564-1719 |
| Primary Part Number | BSSV 8102-51 |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Davis Controls Corp |
| Status | ACTIVE |
| Flow Control Device | DISK, CIRCULAR |
| Second End Relationship with First End | NOT IDENTICAL |
| Body Style | SINGLE CONNECTION, STRAIGHT FLOW |
| End Connection Quantity | 2 |
| Second End Style Designator | PLAIN |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SEAT |
| Material | STEEL CORROSION RESISTING BODY |
| Second End Connection Type | THREADED EXTERNAL PIPE |
| Second End Outside Diameter Tube Accommodated | 0.500 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 |
|---|---|
| BSSV 8102-51 PRIMARY | Davis Controls Corp (USA) |
NSN 4820-01-564-1719 is a Valve,vacuum Breaking, manufactured by Davis Controls Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-564-1719 has 1 manufacturer part number on file: BSSV 8102-51 (Davis Controls Corp).
Key specifications for BSSV 8102-51: Flow Control Device: DISK, CIRCULAR; Second End Relationship with First End: NOT IDENTICAL; Body Style: SINGLE CONNECTION, STRAIGHT FLOW; End Connection Quantity: 2. 11 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.