The Sheet,inlet Tube, cataloged under National Stock Number 4420-01-200-3188, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4420-01-200-3188 |
| Item Name | Sheet,inlet Tube |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Status | ACTIVE |
| General Characteristics Item Description | COPPER NICKEL ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 1-JH-3420-PIECE 1 | 5/9 Secondary reference Westinghouse Electric Corp Power Generation-Generator Div |
| 1JH3420-05 | 3/2 Design control — primary reference U.S. Government activity |
| 3204677 | D/9 Drawing number reference only U.S. Government activity |
| 1-JH-3417 PIECE 18 | 5/9 Secondary reference Westinghouse Electric Corp Power Generation-Generator Div |
| 1-JH-3417 | D/9 Drawing number reference only Westinghouse Electric Corp Power Generation-Generator Div |
NSN 4420-01-200-3188 is a Sheet,inlet Tube, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4420-01-201-7557, 5306-01-206-9734. Verify interchangeability with system specifications before substitution.
Key specifications for 4420-01-200-3188: General Characteristics Item Description: COPPER NICKEL ALLOY. 1 specification is 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.