The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-429-5925, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-429-5925 |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| 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 |
|---|---|
| PL9001A1000-1 ITEM NO. 47 | 5/9 Secondary reference Spectra-Physics Inc |
| 9001A1002 | D/9 Drawing number reference only L-3 Communications Westwood Corporation Dba Edi Division Use CAGE Code 23905 for Cataloging Div Tano Division |
| 900A1A002-1 | C/1 Advisory reference — outside the item-of-supply concept Spectra-Physics Inc |
| 900A1A002-1 | C/1 Advisory reference — outside the item-of-supply concept L-3 Communications Westwood Corporation Dba Edi Division Use CAGE Code 23905 for Cataloging Div Tano Division |
| 9001A1002-1 | 5/9 Secondary reference L-3 Communications Westwood Corporation Dba Edi Division Use CAGE Code 23905 for Cataloging Div Tano Division |
| PL9001A1000-1 ITEM NO. 47 | 5/9 Secondary reference L-3 Communications Westwood Corporation Dba Edi Division Use CAGE Code 23905 for Cataloging Div Tano Division |
| PL9001A1000-3 ITEM NO. 47 | C/1 Advisory reference — outside the item-of-supply concept Wit-Son Carbide Tool Inc |
| 9001A1002 | 5/9 Secondary reference Spectra-Physics Inc |
| 9001A1002-1 | 3/9 Design control — primary reference L3 Technologies, Inc. |
| 900A1A002-1 | 5/9 Secondary reference Electro Products Co |
| PL9001A1000-3 ITEM NO. 47 | 5/9 Secondary reference Spectra-Physics Inc |
NSN 4820-01-429-5925 is a Valve,vacuum Breaking, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-429-5925: Special Features: E/I: PRESSURE REGULATOR SUBASSEMBLY - COLT BYPASS VALVE CONTROL, LSD-41(CV) CLASS. 0 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.