The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-237-8373, 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 Graham Corp. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-237-8373 |
| Primary Part Number | E-14700-221 PIECE 2 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Graham Corp |
| Status | ACTIVE |
| Heat Transfer Method | INDIRECT |
| Style Designator | STRAIGHT PLAIN TUBE, CYLINDRICAL |
| Material | COPPER 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 |
|---|---|
| E-14700-221 PIECE 2 PRIMARY | Graham Corp (USA) |
| Reference | Meaning |
|---|---|
| E-14700-221 PIECE 2 | 5/9 Secondary reference Graham Mfg Co Inc for Procurement Use CAGE Code 1lcx3 |
| E-14700-221 | D/9 Drawing number reference only Graham Mfg Co Inc for Procurement Use CAGE Code 1lcx3 |
NSN 4420-01-237-8373 is a Core Assembly,fluid Cooler, manufactured by Graham Corp, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-237-8373 has 1 manufacturer part number on file: E-14700-221 PIECE 2 (Graham Corp).
4 possible matches (shared part number, not a government interchangeability claim): 4420-01-238-0219, 4420-01-238-0220, 4320-01-238-0831. Verify interchangeability with system specifications before substitution.
Key specifications for E-14700-221 PIECE 2: Heat Transfer Method: INDIRECT; Style Designator: STRAIGHT PLAIN TUBE, CYLINDRICAL; Material: COPPER ALLOY TUBES. 3 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.