The Core Assembly,fluid Heater,indus, cataloged under National Stock Number 4420-01-339-3571, 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 Valad Electric Heating Corp.. Government technical data includes 5 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4420-01-339-3571 |
| Primary Part Number | VDH-261-2-420.0-1 |
| Item Name | Core Assembly,fluid Heater,indus |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Valad Electric Heating Corp. |
| Status | ACTIVE |
| Core Width | 36.000 INCHES NOMINAL IN |
| Heat Transfer Method | INDIRECT |
| Style Designator | STRAIGHT FINNED TUBE, RECTANGULAR |
| Tube Quantity | 25 |
| Material | STEEL TUBES |
| 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 |
|---|---|
| VDH-261-2-420.0-1 PRIMARY | Valad Electric Heating Corp. (USA) |
| 88-0111-FINE-NO.-2 | Valad Electric Heating Corp. (USA) |
| Reference | Meaning |
|---|---|
| 88-0111 | D/9 Drawing number reference only Valad Electric Heating Corp. |
NSN 4420-01-339-3571 is a Core Assembly,fluid Heater,indus, manufactured by Valad Electric Heating Corp., classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-339-3571 has 2 manufacturer part numbers on file: VDH-261-2-420.0-1 (Valad Electric Heating Corp.), 88-0111-FINE-NO.-2 (Valad Electric Heating Corp.).
2 possible matches (shared part number, not a government interchangeability claim): 4420-01-339-3573, 4520-01-339-7774. Verify interchangeability with system specifications before substitution.
Key specifications for VDH-261-2-420.0-1: Core Width: 36.000 INCHES NOMINAL IN; Heat Transfer Method: INDIRECT; Style Designator: STRAIGHT FINNED TUBE, RECTANGULAR; Tube Quantity: 25. 5 specifications are 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.