The Valve,ballast, cataloged under National Stock Number 4820-01-378-8241, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Leybold Usa Inc.. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-378-8241 |
| Primary Part Number | 19660 |
| Item Name | Valve,ballast |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leybold Usa Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | OVERALL LENGTH 139,0MM,PORT OD DIA 39,0MM,ID 38,0MM,E/I 4920NCD161986,CAGE K0656 MM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4820-01-378-8241 is a Valve,ballast, manufactured by Leybold Usa Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-378-8241 has 2 manufacturer part numbers on file: 19660 (Leybold Usa Inc.), 5903-0004 (Bae Systems (operations) Limited).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-624-2075. Verify interchangeability with system specifications before substitution.
Key specifications for 19660: General Characteristics Item Description: OVERALL LENGTH 139,0MM,PORT OD DIA 39,0MM,ID 38,0MM,E/I 4920NCD161986,CAGE K0656 MM. 1 specification is 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.