The Cooler,fluid,industrial, cataloged under National Stock Number 4420-01-373-0546, 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 Boyd Corporation (woburn) Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-373-0546 |
| Primary Part Number | 6320G3SB |
| Item Name | Cooler,fluid,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Boyd Corporation (woburn) Inc |
| Status | ACTIVE |
| Heat Transfer Method | INDIRECT |
| Length | 21.800 INCHES NOMINAL IN |
| Supplementary Features | 18.0LB LBS |
| Style Designator | UPRIGHT STRAIGHT FINNED TYPE |
| Tube Attachment Method | BRAZED BOTH ENDS |
| Height | 12.000 INCHES NOMINAL IN |
| Material | COPPER TUBES |
| Material | ALUMINUM HOUSING |
| Thickness | 2.100 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 |
|---|---|
| 6320G3SB PRIMARY | Boyd Corporation (woburn) Inc (USA) |
| Reference | Meaning |
|---|---|
| 6509979 | D/9 Drawing number reference only Naval Sea Systems Command |
| 6320G3 | 5/9 Secondary reference Boyd Corporation (woburn) Inc |
NSN 4420-01-373-0546 is a Cooler,fluid,industrial, manufactured by Boyd Corporation (woburn) Inc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-373-0546 has 1 manufacturer part number on file: 6320G3SB (Boyd Corporation (woburn) Inc).
Key specifications for 6320G3SB: Heat Transfer Method: INDIRECT; Length: 21.800 INCHES NOMINAL IN; Supplementary Features: 18.0LB LBS; Style Designator: UPRIGHT STRAIGHT FINNED TYPE. 9 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.