The Heater,water,electric, cataloged under National Stock Number 4520-01-504-2033, 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 The Electric Heater Co Dba Hubbell Electric Heater Co.. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 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 | 4520-01-504-2033 |
| Primary Part Number | 02-5544 |
| Item Name | Heater,water,electric |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | The Electric Heater Co Dba Hubbell Electric Heater Co. |
| Status | ACTIVE |
| Thermostatic Switch | INCLUDED |
| Water Outlet Connection Thread Size and Series/type Designator | 3/4-14 NPT |
| Water Outlet Connection Quantity | 1 |
| Phase | SINGLE |
| Voltage in Volts and Current Type | 240.0 AC |
| Capacity | 6.0 GALLONS TANK |
| Heating Capacity Per Hour | 72.0 GALLONS |
| Water Inlet Connection Quantity | 1 |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Water Inlet Connection Thread Size and Series/type Designator | 3/4-14 NPT |
| Insulated Feature | INCLUDED |
| Attachment Device | INCLUDED |
| Heating Element Type | ANY ACCEPTABLE |
| Temp Rise Per Hour | 40.0 FAHRENHEIT DEGF |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4520-01-504-2033 is a Heater,water,electric, manufactured by The Electric Heater Co Dba Hubbell Electric Heater Co., classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-504-2033 has 2 manufacturer part numbers on file: A67S (The Electric Heater Co Dba Hubbell Electric Heater Co.), 02-5544 (The Electric Heater Co Dba Hubbell Electric Heater Co.).
1 possible match (shared part number, not a government interchangeability claim): 5950-01-508-8489. Verify interchangeability with system specifications before substitution.
Key specifications for 02-5544: Thermostatic Switch: INCLUDED; Overall Height: 20.500 INCHES NOMINAL IN; Water Outlet Connection Thread Size and Series/type Designator: 3/4-14 NPT; Water Outlet Connection Quantity: 1. 15 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.