The Heating Element,electrical,immer, cataloged under National Stock Number 4520-00-724-2200, 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 13 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-724-2200 |
| Primary Part Number | 155-116078-001 |
| 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 |
| Phase | NOT RATED SINGLE VOLTAGE |
| Terminal Quantity | 4 |
| Length | 12.375 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 440.0 AC SINGLE VOLTAGE |
| Body Style | FLANGE, TYPE |
| Maximum Wattage Rating in Watts | 20000.0 SINGLE VOLTAGE |
| Element Connection Style | STUD TYPE |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Heat Quantity | 1 |
| Element Radiation Spectrum | NONINFRARED |
| Material | NICKEL AND CHROMIUM RESISTANCE WIRE |
| Material | NICKEL AND COPPER 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 |
|---|---|
| 155-116078-001 PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| BSL-155-116078-001 | British Sarozal Ltd (GBR) |
| 17723-11 | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| F20443ES | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
NSN 4520-00-724-2200 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 4520-00-724-2200 has 4 manufacturer part numbers on file: 155-116078-001 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), BSL-155-116078-001 (British Sarozal Ltd), 17723-11 (The Electric Heater Co Dba Hubbell Electric Heater Co.), F20443ES (The Electric Heater Co Dba Hubbell Electric Heater Co.).
1 possible match (shared part number, not a government interchangeability claim): 3930-01-274-9528. Verify interchangeability with system specifications before substitution.
Key specifications for 155-116078-001: Phase: NOT RATED SINGLE VOLTAGE; Terminal Quantity: 4; Length: 12.375 INCHES NOMINAL IN; Voltage in Volts and Current Type: 440.0 AC SINGLE VOLTAGE. 13 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.