The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-152-3177, 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 Young Touchstone Company Div Young Touchstone. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-152-3177 |
| Primary Part Number | E251839 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Young Touchstone Company Div Young Touchstone |
| Status | ACTIVE |
| Heat Transfer Method | INDIRECT |
| Style Designator | STRAIGHT PLAIN TUBE, CYLINDRICAL |
| Core Diameter | 3.440 INCHES MINIMUM AND 3.450 INCHES MAXIMUM IN |
| Tube Quantity | 68 |
| Core Length | 21.562 INCHES NOMINAL IN |
| Tubing Outside Diameter | 0.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| E251839 PRIMARY | Young Touchstone Company Div Young Touchstone (USA) |
| E247069 PIECE 3 | Young Touchstone Company Div Young Touchstone (USA) |
| Reference | Meaning |
|---|---|
| E247069 | D/9 Drawing number reference only Young Touchstone Company Div Young Touchstone |
NSN 4420-01-152-3177 is a Core Assembly,fluid Cooler, manufactured by Young Touchstone Company Div Young Touchstone, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-152-3177 has 2 manufacturer part numbers on file: E251839 (Young Touchstone Company Div Young Touchstone), E247069 PIECE 3 (Young Touchstone Company Div Young Touchstone).
Key specifications for E251839: Heat Transfer Method: INDIRECT; Style Designator: STRAIGHT PLAIN TUBE, CYLINDRICAL; Core Diameter: 3.440 INCHES MINIMUM AND 3.450 INCHES MAXIMUM IN; Tube Quantity: 68. 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.