The Cooler,oil, cataloged under National Stock Number 4420-00-403-6007, 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 Thermal Engineering International (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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4420-00-403-6007 |
| Primary Part Number | B223-121A |
| Item Name | Cooler,oil |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Thermal Engineering International (usa) Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | PERFEX CORP,PART NO. B223-121A A |
| 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 |
|---|---|
| B223-121A PRIMARY | Thermal Engineering International (usa) Inc. (USA) |
| X2090B223-121A | Thermal Engineering International (usa) Inc. (USA) |
| Reference | Meaning |
|---|---|
| X2090B223-121A | 5/9 Secondary reference Thermal Engineering International Usa Inc |
| B223-121A | 5/9 Secondary reference Thermal Engineering International Usa Inc |
| 701132 | C/1 Advisory reference — outside the item-of-supply concept Dresser, Llc |
NSN 4420-00-403-6007 is a Cooler,oil, manufactured by Thermal Engineering International (usa) Inc., classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-00-403-6007 has 2 manufacturer part numbers on file: B223-121A (Thermal Engineering International (usa) Inc.), X2090B223-121A (Thermal Engineering International (usa) Inc.).
1 possible match (shared part number, not a government interchangeability claim): 2920-01-603-6284. Verify interchangeability with system specifications before substitution.
Key specifications for B223-121A: General Characteristics Item Description: PERFEX CORP,PART NO. B223-121A A. 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.