The Element,housing Ay, cataloged under National Stock Number 4520-01-660-1088, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4520-01-660-1088 |
| Primary Part Number | XF2164403ES |
| Item Name | Element,housing Ay |
| 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 |
|---|---|
| XF2164403ES PRIMARY | The Electric Heater Co Dba Hubbell Electric Heater Co. (USA) |
| Reference | Meaning |
|---|---|
| 17757 REV F PIECE NO 8 INCONEL | C/1 Advisory reference — outside the item-of-supply concept The Electric Heater Co Dba Hubbell Electric Heater Co. |
NSN 4520-01-660-1088 is a Element,housing Ay, manufactured by The Electric Heater Co Dba Hubbell Electric Heater Co., classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-660-1088 has 1 manufacturer part number on file: XF2164403ES (The Electric Heater Co Dba Hubbell Electric Heater Co.).
1 possible match (shared part number, not a government interchangeability claim): 4520-01-660-1134. Verify interchangeability with system specifications before substitution.
Key specifications for XF2164403ES: End Item Identification: HEATER, WATER 177. 0 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.