The Heater,water,electric, cataloged under National Stock Number 4520-01-558-4358, 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.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Heater,water,electric |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Manufacturers | The Electric Heater Co Dba Hubbell Electric Heater Co. (CAGE 19857) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-558-4358 |
| Primary Part Number | 17756 TYPE 4 |
| 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 |
| 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 |
|---|---|
| 17756 TYPE 4 PRIMARY | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| 17756-T4 | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| 17756 REV B TYPE 4 | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| Reference | Meaning |
|---|---|
| 17756 | D/9 Drawing number reference only The Electric Heater Co Dba Hubbell Electric Heater Co. |
NSN 4520-01-558-4358 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 4520-01-558-4358 has 3 manufacturer part numbers on file: 17756 TYPE 4 (The Electric Heater Co Dba Hubbell Electric Heater Co.), 17756-T4 (The Electric Heater Co Dba Hubbell Electric Heater Co.), 17756 REV B TYPE 4 (The Electric Heater Co Dba Hubbell Electric Heater Co.).
4 possible matches (shared part number, not a government interchangeability claim): 6685-01-558-4361, 6680-01-558-4368, 5330-01-558-6038. Verify interchangeability with system specifications before substitution.
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.