The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-204-8309, 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 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-204-8309 |
| Primary Part Number | 166M1942B2 PIECE 13 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Fluid Handling Llc |
| Status | ACTIVE |
| Heat Transfer Method | INDIRECT |
| Style Designator | FINNED "U" TUBE |
| Tube Quantity | 12 |
| Tube Attachment Method | EXPANDED BOTH ENDS |
| Core Length | 109.250 INCHES NOMINAL IN |
| Tubing Outside Diameter | 0.625 INCHES NOMINAL BOTH INLET AND OUTLET TUBE ENDS IN |
| Material | COPPER AND NICKEL ALLOY 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 |
|---|---|
| 166M1942B2 PIECE 13 PRIMARY | Fluid Handling Llc (USA) |
| Reference | Meaning |
|---|---|
| 166M1942B2 | D/9 Drawing number reference only Fluid Handling Llc |
| 166M1942B2 PIECE 13 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 166M1942B2 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
NSN 4420-01-204-8309 is a Core Assembly,fluid Cooler, manufactured by Fluid Handling Llc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-204-8309 has 1 manufacturer part number on file: 166M1942B2 PIECE 13 (Fluid Handling Llc).
Key specifications for 166M1942B2 PIECE 13: Heat Transfer Method: INDIRECT; Style Designator: FINNED "U" TUBE; Tube Quantity: 12; Tube Attachment Method: EXPANDED BOTH ENDS. 7 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.