The Heater,oil, cataloged under National Stock Number 4520-01-250-6263, 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 Wiegand E L Div Emerson Electric 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Heater,oil |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Manufacturers | Wiegand E L Div Emerson Electric Co (CAGE 1Y377) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-250-6263 |
| Primary Part Number | TMO-306VLTXX |
| Item Name | Heater,oil |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Wiegand E L Div Emerson Electric Co |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| TMO-306VLTXX PRIMARY | Wiegand E L Div Emerson Electric Co (USA) |
| Reference | Meaning |
|---|---|
| 155-112916-002 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 4520-01-250-6263 is a Heater,oil, manufactured by Wiegand E L Div Emerson Electric Co, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-250-6263 has 1 manufacturer part number on file: TMO-306VLTXX (Wiegand E L Div Emerson Electric Co).
1 possible match (shared part number, not a government interchangeability claim): 4520-01-290-9143. 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.