The Heater,immersion,liquid Fuel Fir, cataloged under National Stock Number 4520-01-197-2095, 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 Johnson Controls Navy Systems, Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-197-2095 |
| Primary Part Number | 025-18235 |
| Item Name | Heater,immersion,liquid Fuel Fir |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Johnson Controls Navy Systems, Llc |
| Status | ACTIVE |
| General Characteristics Item Description | CRANKCASE HEATER; 150 WATTS |
| 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 |
|---|---|
| 025-18235 PRIMARY | Johnson Controls Navy Systems, Llc (USA) |
| 365-24237 ITEM 18 | Johnson Controls Navy Systems, Llc (USA) |
| 156-500543-511 | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| Reference | Meaning |
|---|---|
| 025-18235B | C/1 Advisory reference — outside the item-of-supply concept Johnson Controls Navy Systems, Llc |
NSN 4520-01-197-2095 is a Heater,immersion,liquid Fuel Fir, manufactured by Johnson Controls Navy Systems, Llc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-197-2095 has 3 manufacturer part numbers on file: 025-18235 (Johnson Controls Navy Systems, Llc), 365-24237 ITEM 18 (Johnson Controls Navy Systems, Llc), 156-500543-511 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
Key specifications for 025-18235: General Characteristics Item Description: CRANKCASE HEATER; 150 WATTS. 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.