The Collar,fluid Cooler, cataloged under National Stock Number 4420-01-421-5330, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Collar,fluid Cooler |
| FSC / FSG | 4420 — Heat Exchangers and Steam Condensers (FSG 44) |
| Manufacturers | Alfa Laval Inc (CAGE 71871) |
| Parameter | Value |
|---|---|
| NSN | 4420-01-421-5330 |
| Primary Part Number | 1625259 02 |
| Item Name | Collar,fluid Cooler |
| 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 |
|---|---|
| 8723963 ITEM 37 | Alfa Laval Inc (USA) |
| 1625259 02 PRIMARY | Alfa Laval Inc (USA) |
| Reference | Meaning |
|---|---|
| 8723963 | D/9 Drawing number reference only Alfa Laval Inc |
NSN 4420-01-421-5330 is a Collar,fluid Cooler, manufactured by Alfa Laval Inc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-421-5330 has 2 manufacturer part numbers on file: 8723963 ITEM 37 (Alfa Laval Inc), 1625259 02 (Alfa Laval Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4420-01-423-3150, 4420-01-430-2626. 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.