The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-372-2717, 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 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-372-2717 |
| Primary Part Number | 118-553680-241 |
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc |
| Status | ACTIVE |
| Terminal Quantity | 2 |
| Length | 17.390 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 277.0 AC SINGLE VOLTAGE |
| Body Style | FINNED, TUBULAR, U SHAPED |
| Hole or Slot Quantity | 1 |
| Terminal Length | 0.625 INCHES NOMINAL IN |
| Element Connection Style | STUD TYPE |
| Effective Heating Length | 15.390 INCHES NOMINAL IN |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Heat Quantity | 1 |
| Element Radiation Spectrum | NONINFRARED |
| Material | STEEL CORROSION RESISTING SHEATH |
| 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 |
|---|---|
| 118-553680-241 PRIMARY | Chromalox Inc (USA) |
| Reference | Meaning |
|---|---|
| 118-553680-000 | D/9 Drawing number reference only Chromalox Inc |
NSN 4520-01-372-2717 is a Heating Element,electrical,nonim, manufactured by Chromalox Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-372-2717 has 1 manufacturer part number on file: 118-553680-241 (Chromalox Inc).
Key specifications for 118-553680-241: Terminal Quantity: 2; Length: 17.390 INCHES NOMINAL IN; Voltage in Volts and Current Type: 277.0 AC SINGLE VOLTAGE; Body Style: FINNED, TUBULAR, U SHAPED. 13 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.