The Heater,fluid,industrial, cataloged under National Stock Number 4420-01-307-3790, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-307-3790 |
| Primary Part Number | 1551AS481-1 |
| Item Name | Heater,fluid,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Heat Transfer Method | INDIRECT |
| Length | 24.000 INCHES NOMINAL IN |
| Style Designator | UPRIGHT STRAIGHT FINNED TYPE |
| Tubing Outside Diameter | 0.750 INCHES NOMINAL BOTH INLET AND OUTLET TUBE ENDS IN |
| Height | 12.690 INCHES NOMINAL IN |
| Capacity Rating | 600.0 GALLONS PER HOUR |
| Material | ALUMINUM HOUSING |
| Thickness | 1.500 INCHES NOMINAL IN |
| 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 |
|---|---|
| 1551AS481-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 1551AS481 | D/9 Drawing number reference only Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 4420-01-307-3790 is a Heater,fluid,industrial, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-307-3790 has 1 manufacturer part number on file: 1551AS481-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 1551AS481-1: Heat Transfer Method: INDIRECT; Length: 24.000 INCHES NOMINAL IN; Style Designator: UPRIGHT STRAIGHT FINNED TYPE; Tubing Outside Diameter: 0.750 INCHES NOMINAL BOTH INLET AND OUTLET TUBE ENDS IN. 8 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.