The Heater,oil Immersio, cataloged under National Stock Number 4520-01-656-1622, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Allied Systems Company Dba Allied Systems Co. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | Heater,oil Immersio |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Manufacturers | Allied Systems Company Dba Allied Systems Co (CAGE 60848) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-656-1622 |
| Primary Part Number | 250373 |
| Item Name | Heater,oil Immersio |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Allied Systems Company Dba Allied Systems Co |
| Status | ACTIVE |
| 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 |
|---|---|
| 250373 PRIMARY | Allied Systems Company Dba Allied Systems Co (USA) |
NSN 4520-01-656-1622 is a Heater,oil Immersio, manufactured by Allied Systems Company Dba Allied Systems Co, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-656-1622 has 1 manufacturer part number on file: 250373 (Allied Systems Company Dba Allied Systems Co).
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.