The Head,bottom Flanged, cataloged under National Stock Number 4620-00-378-1973, is classified within Federal Supply Class 4620 (Water Distillation Equipment, Marine and Industrial) of the Water Purification and Sewage Treatment group. The manufacturer of record is Bath Iron Works Corporation. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Head,bottom Flanged |
| FSC / FSG | 4620 — Water Distillation Equipment, Marine and Industrial (FSG 46) |
| Manufacturers | Bath Iron Works Corporation (CAGE 70876) |
| Parameter | Value |
|---|---|
| NSN | 4620-00-378-1973 |
| Primary Part Number | 51-447PC7-29-121 |
| Item Name | Head,bottom Flanged |
| FSC / FSG | 4620 / 46 — Water Distillation Equipment, Marine and Industrial |
| Manufacturer | Bath Iron Works Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 51-447PC7-29-121 PRIMARY | Bath Iron Works Corporation (USA) |
| M36558P7 PRIMARY | Bath Iron Works Corporation (USA) |
| 51-141PC7-29-121 PRIMARY | Bath Iron Works Corporation (USA) |
| M36558-7-29-121 PRIMARY | Bath Iron Works Corporation (USA) |
| 2E10-1 PRIMARY | Bath Iron Works Corporation (USA) |
NSN 4620-00-378-1973 is a Head,bottom Flanged, manufactured by Bath Iron Works Corporation, classified under FSC 4620, Water Distillation Equipment, Marine and Industrial. Status: active.
NSN 4620-00-378-1973 has 5 manufacturer part numbers on file: 51-447PC7-29-121 (Bath Iron Works Corporation), M36558P7 (Bath Iron Works Corporation), 51-141PC7-29-121 (Bath Iron Works Corporation), M36558-7-29-121 (Bath Iron Works Corporation), 2E10-1 (Bath Iron Works Corporation).
1 possible match (shared part number, not a government interchangeability claim): 1680-01-042-3956. Verify interchangeability with system specifications before substitution.
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.