The Tube Bundle,outer, cataloged under National Stock Number 4420-01-149-3410, 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 Aqua-Chem, Inc. Dba Aqua-Chem 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-149-3410 |
| Primary Part Number | 534-07788-000 |
| Item Name | Tube Bundle,outer |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Aqua-Chem, Inc. Dba Aqua-Chem Inc |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL; SEAMLESS; PAINTED WITH HEAT RESISTING PAINT |
| 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 |
|---|---|
| 534-07788-000 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 702-7534 PIECE 4 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| Reference | Meaning |
|---|---|
| 534-07788-000 | 3/9 Design control — primary reference Aqua-Chem, Inc. |
| 702-7534 | D/9 Drawing number reference only Aqua-Chem, Inc. |
| 534-7788 | 5/9 Secondary reference Aqua-Chem, Inc. |
| 702-7534 PIECE 4 | 5/9 Secondary reference Aqua-Chem, Inc. |
NSN 4420-01-149-3410 is a Tube Bundle,outer, manufactured by Aqua-Chem, Inc. Dba Aqua-Chem Inc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-149-3410 has 2 manufacturer part numbers on file: 534-07788-000 (Aqua-Chem, Inc. Dba Aqua-Chem Inc), 702-7534 PIECE 4 (Aqua-Chem, Inc. Dba Aqua-Chem Inc).
3 possible matches (shared part number, not a government interchangeability claim): 4420-01-149-3411, 5999-01-157-4479, 4420-01-290-1390. Verify interchangeability with system specifications before substitution.
Key specifications for 534-07788-000: General Characteristics Item Description: STEEL; SEAMLESS; PAINTED WITH HEAT RESISTING PAINT. 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.