The Heater,water,electric, cataloged under National Stock Number 4520-01-537-4256, 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 Hatco Corp. Government technical data includes 7 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 | 4520-01-537-4256 |
| Primary Part Number | S-39 |
| Item Name | Heater,water,electric |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Hatco Corp |
| Status | ACTIVE |
| Thermostatic Switch | INCLUDED |
| Phase | THREE |
| Capacity | 16.0 GALLONS TANK |
| Insulated Feature | INCLUDED |
| Attachment Device | INCLUDED |
| Heating Element Type | TRIPLE |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| S-39 PRIMARY | Hatco Corp (USA) |
NSN 4520-01-537-4256 is a Heater,water,electric, manufactured by Hatco Corp, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-537-4256 has 1 manufacturer part number on file: S-39 (Hatco Corp).
Key specifications for S-39: Thermostatic Switch: INCLUDED; Phase: THREE; Capacity: 16.0 GALLONS TANK; Insulated Feature: INCLUDED. 7 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.