The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-294-5978, 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 Chromalox Inc. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-294-5978 |
| Primary Part Number | 393-071937-001 |
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc |
| Status | ACTIVE |
| Terminal Quantity | 2 |
| Voltage in Volts and Current Type | 120.0 AC SINGLE VOLTAGE |
| Body Style | FINNED, TUBULAR, TERMINAL'S AT EACH END |
| Terminal Length | 1.000 INCHES NOMINAL IN |
| Turn Quantity | H |
| Element Connection Style | STUD TYPE |
| Effective Heating Length | 33.250 INCHES NOMINAL IN |
| Minimum Clearance Distance | 2.250 INCHES NOMINAL IN |
| Watt Density Rating | 25.0 PER SQUARE INCH SINGLE VOLTAGE |
| Element Radiation Spectrum | NONINFRARED |
| Element Quantity | 1 |
| 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 |
|---|---|
| 393-071937-001 PRIMARY | Chromalox Inc (USA) |
| Reference | Meaning |
|---|---|
| 393-071937-000 | 5/9 Secondary reference Chromalox Inc |
| 5188231 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
NSN 4520-01-294-5978 is a Heating Element,electrical,nonim, manufactured by Chromalox Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-294-5978 has 1 manufacturer part number on file: 393-071937-001 (Chromalox Inc).
Key specifications for 393-071937-001: Terminal Quantity: 2; Voltage in Volts and Current Type: 120.0 AC SINGLE VOLTAGE; Body Style: FINNED, TUBULAR, TERMINAL'S AT EACH END; Terminal Length: 1.000 INCHES NOMINAL IN. 11 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.