The Chassis,portable Heater, cataloged under National Stock Number 4520-01-254-7420, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4520-01-254-7420 |
| Item Name | Chassis,portable Heater |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| 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 |
| Reference | Meaning |
|---|---|
| 74258 | D/9 Drawing number reference only U.S. Government activity |
| 74258-1 | 5/2 Secondary reference U.S. Government activity |
| 74258-1 | 3/9 Design control — primary reference U.S. Government activity |
| 74258-1 | 5/9 Secondary reference Drs Environmental Systems Inc |
NSN 4520-01-254-7420 is a Chassis,portable Heater, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5930-01-278-6902, 5340-01-348-0752. Verify interchangeability with system specifications before substitution.
Key specifications for 4520-01-254-7420: End Item Identification: 4130-00-859-5420. 0 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.