The Head Assembly,upper, cataloged under National Stock Number 4420-01-211-1018, 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-211-1018 |
| Item Name | Head Assembly,upper |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Status | ACTIVE |
| General Characteristics Item Description | BRONZE; W/BRAZED CONNECTIONS |
| 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 |
|---|---|
| 8216 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4420-01-211-1018 is a Head Assembly,upper, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
Key specifications for 4420-01-211-1018: General Characteristics Item Description: BRONZE; W/BRAZED CONNECTIONS; End Item Identification: AERCO INTERNATIONAL INC MODEL SW1A HEAT EXCHANGER. 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.