The Plate,seal, cataloged under National Stock Number 4420-00-440-3574, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-00-440-3574 |
| Item Name | Plate,seal |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS. |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| PADRC81860-1 | 5/1 Secondary reference Westinghouse Electric Corp |
| 909J147PC1 | 3/1 Design control — primary reference Westinghouse Electric Corp |
| F44225-1-2PC2-15 | 5/9 Secondary reference Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco |
| F44225-1-2PC2-15 | C/1 Advisory reference — outside the item-of-supply concept Fairbanks Morse, Llc |
| F44245-1-3PC1-26 | 5/9 Secondary reference Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco |
| F44225-1-2PC2-15 | 5/1 Secondary reference Emerson Electric Co Alco Controls Div |
| E231-327PC327-6 | 5/9 Secondary reference U.S. Government activity |
| F44245-1-3PC1-26 | C/1 Advisory reference — outside the item-of-supply concept Fairbanks Morse, Llc |
| F44245-1-3 PT.1-26 | C/1 Advisory reference — outside the item-of-supply concept Fairbanks Morse, Llc |
| F44245-1-3 PT.1-26 | 5/9 Secondary reference Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco |
NSN 4420-00-440-3574 is a Plate,seal, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4470-00-995-0673. Verify interchangeability with system specifications before substitution.
Key specifications for 4420-00-440-3574: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.. 2 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.
NSN 4420-00-440-3574 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.