The Waterbox,condenser, cataloged under National Stock Number 4420-00-640-8978, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-00-640-8978 |
| Item Name | Waterbox,condenser |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Status | ACTIVE |
| Reference Number Differentiating Characteristics | STARBOARD CONDENSER INLET AND OUTLET |
| 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 |
|---|---|
| 3242863 | 5/1 Secondary reference U.S. Government activity |
| 12128BSTBDIX0 | 5/9 Secondary reference Coast Engineering and Mfg Co Navy Contract Program Office |
| 12128D | 3/9 Design control — primary reference Coast Engineering and Mfg Co Navy Contract Program Office |
NSN 4420-00-640-8978 is a Waterbox,condenser, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
Key specifications for 4420-00-640-8978: Reference Number Differentiating Characteristics: STARBOARD CONDENSER INLET AND OUTLET. 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.