The Heating Element,electrical,immer, cataloged under National Stock Number 4520-01-503-6626, 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 26 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4520-01-503-6626 |
| Primary Part Number | 155-073098-005 REV 4 |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc |
| Status | ACTIVE |
| Flange Diameter | 13.500 INCHES NOMINAL IN |
| Phase | SINGLE OR THREE SINGLE VOLTAGE |
| Frequency in Hertz | 60.0 |
| Terminal Quantity | 48 |
| Length | 23.500 INCHES MINIMUM AND 24.500 INCHES MAXIMUM IN |
| Voltage in Volts and Current Type | 440.0 AC SINGLE VOLTAGE |
| Body Style | FLANGE TYPE |
| Hole or Slot Quantity | 8 |
| Flange Thickness | 1.125 INCHES NOMINAL IN |
| Maximum Wattage Rating in Watts | 18000.000 SINGLE VOLTAGE |
| Terminal Length | 1.250 INCHES NOMINAL IN |
| Element Connection Style | STUD TYPE |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Nominal Thread Size | 0.500 INCHES MOUNTING FACILITY IN |
| Heat Quantity | 1 |
| Watt Density Rating | 13.0 PER SQUARE INCH SINGLE VOLTAGE |
| Bolt Circle Diameter | 11.750 INCHES NOMINAL IN |
| Heat Control Type | THERMOCOUPLE |
| Conduit Opening Size | 0.750 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN |
| Element Radiation Spectrum | NONINFRARED |
| Material | NICKEL ALLOY E RESISTANCE WIRE |
| Material | STEEL COMP 304L SHEATH |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) MOUNTING FACILITY |
| Thread Quantity | 13 PER INCH MOUNTING FACILITY |
| Hole Diameter | 0.875 INCHES NOMINAL IN |
| Element Quantity | 24 |
| 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 |
|---|---|
| 155-073098-005 REV 4 PRIMARY | Chromalox Inc (USA) |
| 073098005 | Chromalox Inc (USA) |
| Reference | Meaning |
|---|---|
| 155-073098-005 REV 1 | 5/9 Secondary reference Chromalox Inc |
NSN 4520-01-503-6626 is a Heating Element,electrical,immer, manufactured by Chromalox Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-503-6626 has 2 manufacturer part numbers on file: 155-073098-005 REV 4 (Chromalox Inc), 073098005 (Chromalox Inc).
Key specifications for 155-073098-005 REV 4: Flange Diameter: 13.500 INCHES NOMINAL IN; Phase: SINGLE OR THREE SINGLE VOLTAGE; Frequency in Hertz: 60.0; Terminal Quantity: 48. 26 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.