The Baffle,fluid Cooler,industrial, cataloged under National Stock Number 4420-01-421-4658, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. The manufacturer of record is Alfa Laval Inc. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Baffle,fluid Cooler,industrial |
| FSC / FSG | 4420 — Heat Exchangers and Steam Condensers (FSG 44) |
| Manufacturers | Fincantieri S.p.a. Div Direzione Navi Militari (CAGE A3121); Alfa Laval Inc (CAGE 71871); Alfa Laval Spa (CAGE A0147) |
| Parameter | Value |
|---|---|
| NSN | 4420-01-421-4658 |
| Primary Part Number | 371541 0403 |
| Item Name | Baffle,fluid Cooler,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Alfa Laval Inc |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 371541 4003 | Fincantieri S.p.a. Div Direzione Navi Militari (ITA) |
| 371541 0403 PRIMARY | Alfa Laval Inc (USA) |
| 8723963 ITEM 31B | Alfa Laval Inc (USA) |
| 371541 4003 | Alfa Laval Spa (ITA) |
| Reference | Meaning |
|---|---|
| 371541-4003 LT | 5/9 Secondary reference Alfa Laval Inc |
| 371541-4003 | 5/9 Secondary reference Alfa Laval Inc |
| 8723963 | D/9 Drawing number reference only Alfa Laval Inc |
NSN 4420-01-421-4658 is a Baffle,fluid Cooler,industrial, manufactured by Alfa Laval Inc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-421-4658 has 4 manufacturer part numbers on file: 371541 4003 (Fincantieri S.p.a. Div Direzione Navi Militari), 371541 0403 (Alfa Laval Inc), 8723963 ITEM 31B (Alfa Laval Inc), 371541 4003 (Alfa Laval Spa).
4 possible matches (shared part number, not a government interchangeability claim): 4420-01-421-5311, 4420-01-421-5330, 4420-01-423-3150. 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.