The Heater,space, cataloged under National Stock Number 4520-01-557-4255, 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 W.w. Grainger, Inc. Div Government Sales Division. Government technical data includes 16 specifications, 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 | 4520-01-557-4255 |
| Primary Part Number | 4XA50 |
| Item Name | Heater,space |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | W.w. Grainger, Inc. Div Government Sales Division |
| Status | ACTIVE |
| Heat Delivery Rate | 600.0 BRITISH THERMAL UNIT |
| Frequency in Hertz | 60.0 |
| Current Type | AC |
| Integral Fuel Tank Capacity | 40.0 GALLONS |
| Voltage in Volts | 120.0 |
| Fuel Type | KEROSENE OR FUEL OIL |
| Height | 48.000 INCHES NOMINAL IN |
| Depth | 78.000 INCHES NOMINAL IN |
| Width | 34.500 INCHES NOMINAL IN |
| Fuel Consumption Rate Per Hour | 4.5 GALLONS |
| Ignition Method | MANUAL |
| Mounting Type | FLOOR SURFACE, FREE STANDING, NONDUCTED |
| Fuel Feed Method | INTERNAL PUMP |
| Heating Element Type | COMBUSTION CHAMBER |
| Current Rating in Amps | 7.1 |
| Operating Control Type | THERMOSTATIC |
| 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 |
|---|---|
| 4XA50 PRIMARY | W.w. Grainger, Inc. Div Government Sales Division (USA) |
NSN 4520-01-557-4255 is a Heater,space, manufactured by W.w. Grainger, Inc. Div Government Sales Division, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-557-4255 has 1 manufacturer part number on file: 4XA50 (W.w. Grainger, Inc. Div Government Sales Division).
Key specifications for 4XA50: Heat Delivery Rate: 600.0 BRITISH THERMAL UNIT; Frequency in Hertz: 60.0; Current Type: AC; Integral Fuel Tank Capacity: 40.0 GALLONS. 16 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.