The Heating Element,electrical,immer, cataloged under National Stock Number 4520-00-404-7335, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-404-7335 |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Phase | SINGLE SINGLE VOLTAGE |
| Frequency in Hertz | 400.0 |
| Length | 9.750 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 115.0 AC SINGLE VOLTAGE |
| Body Style | SCREW TYPE |
| Maximum Wattage Rating in Watts | 500.0 SINGLE VOLTAGE |
| Terminal Box Environmental Protection | STANDARD |
| Mounting Method Style | PIPE THREAD TYPE MOUNTING FACILITY |
| Nominal Thread Size | 1.000 INCHES MOUNTING FACILITY IN |
| Heat Quantity | 1 |
| Watt Density Rating | 30.0 PER SQUARE INCH SINGLE VOLTAGE |
| Conduit Opening Size | 0.500 INCHES NOMINAL IN |
| Element Radiation Spectrum | NONINFRARED |
| Material | STEEL CORROSION RESISTING SHEATH |
| Thread Series Designator | NPT MOUNTING FACILITY |
| Thread Quantity | 11.5 PER INCH MOUNTING FACILITY |
| 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 |
| Reference | Meaning |
|---|---|
| T1301 | 3/9 Design control — primary reference Western Controls Div of Wahlco Inc |
| 3200513-3 | 7/2 Vendor item drawing reference Cosmodyne, Llc Dba Cosmodyne Llc |
NSN 4520-00-404-7335 is a Heating Element,electrical,immer, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6685-00-874-7240. Verify interchangeability with system specifications before substitution.
Key specifications for 4520-00-404-7335: Phase: SINGLE SINGLE VOLTAGE; Frequency in Hertz: 400.0; Length: 9.750 INCHES NOMINAL IN; Voltage in Volts and Current Type: 115.0 AC SINGLE VOLTAGE. 17 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.