The Heater,ventilation,duct Type, cataloged under National Stock Number 4520-01-243-3403, 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 Chromalox Inc Dba Chromalox Precision Heat and Control, Inc. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-243-3403 |
| Primary Part Number | 106-054986-121 |
| Item Name | Heater,ventilation,duct Type |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| Status | ACTIVE |
| Heat Medium Type | AIR |
| Inclosure Material | STEEL |
| Heating Element Type | ELECTRIC NONIMMERSION |
| 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 |
|---|---|
| 501-5589766 ITEM # 61 | Naval Sea Systems Command (USA) |
| 106-054986-121 PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| 1342759 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 501-5589766 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4520-01-243-3403 is a Heater,ventilation,duct Type, manufactured by Chromalox Inc Dba Chromalox Precision Heat and Control, Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-243-3403 has 3 manufacturer part numbers on file: 501-5589766 ITEM # 61 (Naval Sea Systems Command), 106-054986-121 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), 1342759 (Huntington Ingalls Inc Div Newport News Shipbuilding).
Key specifications for 106-054986-121: Heat Medium Type: AIR; Inclosure Material: STEEL; Heating Element Type: ELECTRIC NONIMMERSION. 3 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.