The Heater,water,electric, cataloged under National Stock Number 4520-01-155-0374, 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 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4520-01-155-0374 |
| Primary Part Number | 17737 TYPE 1 |
| 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 | 1.000-11 1/2 NPT |
| Water Outlet Connection Quantity | 1 |
| Phase | THREE |
| Heating Element Wattage Rating | 6600.000 SINGLE |
| Frequency in Hertz | 60.0 |
| Capacity | 25.0 GALLONS TANK |
| Water Inlet Connection Quantity | 2 |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Water Inlet Connection Thread Size and Series/type Designator | 1.000-11 1/2 NPT |
| Heating Element Type | TRIPLE |
| Material | COPPER ALLOY AND STEEL CORROSION RESISTING |
| Furnished Items and Quantity | SAFETY VALVE 1,TEMPERATURE GAGE 1 |
| 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 |
|---|---|
| 17737 TYPE 1 PRIMARY | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| Reference | Meaning |
|---|---|
| 17737 | D/9 Drawing number reference only The Electric Heater Co Dba Hubbell Electric Heater Co. |
| MIL-H-965 | 4/1 Identification reference U.S. Government activity |
NSN 4520-01-155-0374 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 4520-01-155-0374 has 1 manufacturer part number on file: 17737 TYPE 1 (The Electric Heater Co Dba Hubbell Electric Heater Co.).
1 possible match (shared part number, not a government interchangeability claim): 5935-01-526-9165. Verify interchangeability with system specifications before substitution.
Key specifications for 17737 TYPE 1: Thermostatic Switch: INCLUDED; Overall Height: 49.500 INCHES NOMINAL IN; Water Outlet Connection Thread Size and Series/type Designator: 1.000-11 1/2 NPT; Water Outlet Connection Quantity: 1. 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.