The Heating Element,electrical,immer, cataloged under National Stock Number 4520-01-556-3446, 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 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-556-3446 |
| Primary Part Number | F154403NLY |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| Status | ACTIVE |
| Frequency in Hertz | 60.0 |
| Terminal Quantity | 6 |
| Length | 18.750 INCHES MINIMUM AND 19.250 INCHES MAXIMUM IN |
| Voltage in Volts and Current Type | 440.0 AC SINGLE VOLTAGE |
| Body Style | TUBULAR, FLANGED, W/TERMINALS |
| Maximum Wattage Rating in Watts | 15000.0 SINGLE VOLTAGE |
| Element Connection Style | STUD TYPE |
| Material Document and Classification | MIL-H-22577 MIL SPEC ALL MATERIAL RESPONSES SHEATH |
| Element Radiation Spectrum | NONINFRARED |
| Material | STEEL CORROSION RESISTING SHEATH |
| Element Quantity | 3 |
| 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 |
|---|---|
| 17749 REV C SHT 3 PC 11 | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| F154403NLY PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| 155-044239-013 | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
NSN 4520-01-556-3446 is a Heating Element,electrical,immer, manufactured by Chromalox Inc Dba Chromalox Precision Heat and Control, Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-556-3446 has 3 manufacturer part numbers on file: 17749 REV C SHT 3 PC 11 (The Electric Heater Co Dba Hubbell Electric Heater Co.), F154403NLY (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), 155-044239-013 (The Electric Heater Co Dba Hubbell Electric Heater Co.).
Key specifications for F154403NLY: Frequency in Hertz: 60.0; Terminal Quantity: 6; Length: 18.750 INCHES MINIMUM AND 19.250 INCHES MAXIMUM IN; Voltage in Volts and Current Type: 440.0 AC SINGLE VOLTAGE. 11 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.