The Cooler,fluid,industrial, cataloged under National Stock Number 4420-01-504-5637, 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 Fluid Handling Llc. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-504-5637 |
| Primary Part Number | 5-631-31-131-001 |
| Item Name | Cooler,fluid,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Fluid Handling Llc |
| Status | ACTIVE |
| Heat Transfer Method | INDIRECT |
| Length | 25.840 INCHES NOMINAL IN |
| Style Designator | UPRIGHT STRAIGHT FINNED TYPE |
| Tube Quantity | 131 |
| Height | 79.375 INCHES NOMINAL IN |
| Material | STEEL SHELL |
| Material | TITANIUM PLATES |
| Thickness | 15.470 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 |
|---|---|
| 5-631-31-131-001 PRIMARY | Fluid Handling Llc (USA) |
| Reference | Meaning |
|---|---|
| 5-631-31-131-001 REV C | D/9 Drawing number reference only Fluid Handling Llc |
| 4-750-31-131-001 REV A | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 5-631-31-131-001 REV C | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 5-631-31-131-001 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 4-750-31-131-001 REV A | D/9 Drawing number reference only Fluid Handling Llc |
NSN 4420-01-504-5637 is a Cooler,fluid,industrial, manufactured by Fluid Handling Llc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-504-5637 has 1 manufacturer part number on file: 5-631-31-131-001 (Fluid Handling Llc).
Key specifications for 5-631-31-131-001: Heat Transfer Method: INDIRECT; Length: 25.840 INCHES NOMINAL IN; Style Designator: UPRIGHT STRAIGHT FINNED TYPE; Tube Quantity: 131. 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.