The Heater,radio Assemb, cataloged under National Stock Number 4520-01-481-2551, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-481-2551 |
| Item Name | Heater,radio Assemb |
| 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 |
|---|---|
| S1481 | 3/9 Design control — primary reference Coastal Environmental Systems, Inc. |
NSN 4520-01-481-2551 is a Heater,radio Assemb, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-01-481-2551: End Item Identification: RADIOSONDE SURFACE OBSERVING INSTRUMENTATION SYSTEM (RSOIS). 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.