The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-373-6317, 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 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-373-6317 |
| Primary Part Number | 118-553680-273 |
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc |
| Status | ACTIVE |
| Frequency in Hertz | 60.0 |
| Terminal Quantity | 2 |
| Length | 28.928 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 600.0 AC SINGLE VOLTAGE |
| Body Style | FINNED, TUBULAR, U SHAPED |
| Hole or Slot Quantity | 1 |
| Maximum Wattage Rating in Watts | 3533.00 SINGLE VOLTAGE |
| Terminal Length | 1.109 INCHES NOMINAL IN |
| Element Connection Style | HERMETICALLY SEALED STUD |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Heat Quantity | 1 |
| Element Radiation Spectrum | NONINFRARED |
| Material | STEEL 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 |
|---|---|
| 118-553680-273 PRIMARY | Chromalox Inc (USA) |
| Reference | Meaning |
|---|---|
| 106-302196-998 | D/9 Drawing number reference only Chromalox Inc |
NSN 4520-01-373-6317 is a Heating Element,electrical,nonim, manufactured by Chromalox Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-373-6317 has 1 manufacturer part number on file: 118-553680-273 (Chromalox Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4520-01-373-6322, 4520-01-374-6985. Verify interchangeability with system specifications before substitution.
Key specifications for 118-553680-273: Frequency in Hertz: 60.0; Terminal Quantity: 2; Length: 28.928 INCHES NOMINAL IN; Voltage in Volts and Current Type: 600.0 AC SINGLE VOLTAGE. 14 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.