The Heater,water,steam-Hot Water Hea, cataloged under National Stock Number 4520-01-411-0709, 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 Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 5 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. 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 | 4520-01-411-0709 |
| Primary Part Number | E620 |
| Item Name | Heater,water,steam-Hot Water Hea |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Leslie Controls, Inc. Dba Leslie Controls Inc |
| Status | ACTIVE |
| Water Outlet Connection Quantity | 1 |
| Mounting Position | HORIZONTAL |
| Heating Capacity Per Hour | 52.0 GALLONS |
| Water Inlet Connection Quantity | 1 |
| Material | STEEL CORROSION RESISTING AND COPPER |
| 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 |
|---|---|
| E620 PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
NSN 4520-01-411-0709 is a Heater,water,steam-Hot Water Hea, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-411-0709 has 1 manufacturer part number on file: E620 (Leslie Controls, Inc. Dba Leslie Controls Inc).
1 possible match (shared part number, not a government interchangeability claim): 6720-01-593-2461. Verify interchangeability with system specifications before substitution.
Key specifications for E620: Water Outlet Connection Quantity: 1; Mounting Position: HORIZONTAL; Heating Capacity Per Hour: 52.0 GALLONS; Water Inlet Connection Quantity: 1. 5 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.