The Heater,immersion,liquid Fuel Fir, cataloged under National Stock Number 4520-01-569-7759, 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 Watlow Electric Manufacturing Company Dba Watlow Industries Div Watlow Hannibal. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-569-7759 |
| Primary Part Number | OLN714L3W-MOD |
| Item Name | Heater,immersion,liquid Fuel Fir |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Watlow Electric Manufacturing Company Dba Watlow Industries Div Watlow Hannibal |
| Status | ACTIVE |
| Wattage Rating | 3.000 KILOWATTS |
| 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 |
|---|---|
| OLN714L3W-MOD PRIMARY | Watlow Electric Manufacturing Company Dba Watlow Industries Div Watlow Hannibal (USA) |
NSN 4520-01-569-7759 is a Heater,immersion,liquid Fuel Fir, manufactured by Watlow Electric Manufacturing Company Dba Watlow Industries Div Watlow Hannibal, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-569-7759 has 1 manufacturer part number on file: OLN714L3W-MOD (Watlow Electric Manufacturing Company Dba Watlow Industries Div Watlow Hannibal).
Key specifications for OLN714L3W-MOD: Overall Length: 39.312 INCHES NOMINAL IN; Overall Width: 14.625 INCHES NOMINAL IN; Wattage Rating: 3.000 KILOWATTS; Special Features: APPLICATIONS: PROCESS WATER, MILD CAUSTIC SOLUTIONS (2%MAX), CLEAN WATER;CONTAINS: SLUDGE LEGS, WATROD ELEMENT, THERMO WELL, RISER, FLEXIBLE LEAD WIRES, TERMINAL BLOCK, NEMA 4 TERMINAL ENCLOSURE, 1" CONDUIT OPENING;THIS MODIFIED STOCK CONTAINS SELECTED FACTORY OPTIONS. 1 specification is 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.