The Heating Element,electrical,immer, cataloged under National Stock Number 4520-00-331-2436, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4520-00-331-2436 |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Phase | SINGLE SINGLE VOLTAGE |
| Frequency in Hertz | 60.0 |
| Terminal Quantity | 4 |
| Length | 7.375 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 240.0 AC SINGLE VOLTAGE |
| Body Style | TUBULAR, SCREW TYPE |
| Maximum Wattage Rating in Watts | 3000.0 SINGLE VOLTAGE |
| Mounting Facility Length | 1.563 INCHES NOMINAL IN |
| Element Connection Style | TERMINAL SCREW |
| Effective Heating Length | 7.375 INCHES NOMINAL IN |
| Mounting Method Style | SCREW PLUG OR BUSHING TYPE MOUNTING FACILITY |
| Nominal Thread Size | 2.500 INCHES MOUNTING FACILITY IN |
| Nominal Thread Size | 0.164 INCHES SCREW IN |
| Heat Quantity | 1 |
| Element Radiation Spectrum | NONINFRARED |
| Material | COPPER SHEATH |
| Thread Series Designator | NPT MOUNTING FACILITY |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SCREW |
| Thread Quantity | 8.0 PER INCH MOUNTING FACILITY |
| Thread Quantity | 32.0 PER INCH SCREW |
| 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 |
|---|---|
| C1643-1 | 5/9 Secondary reference Truheat Inc. |
| MT330A | 5/9 Secondary reference Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| 011-151 | 5/9 Secondary reference Cooper Machinery Services Llc |
| 191409 | 5/9 Secondary reference Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| 714LJ0980 | 5/9 Secondary reference Indeeco Llc Dba Indeeco |
| A011-151 | 5/9 Secondary reference White Motor Corp White Superior Div |
| A011-151 | 3/9 Design control — primary reference Cooper Cameron Corp Ajax-Superior Div |
NSN 4520-00-331-2436 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): 4520-01-011-3378. Verify interchangeability with system specifications before substitution.
Key specifications for 4520-00-331-2436: Phase: SINGLE SINGLE VOLTAGE; Frequency in Hertz: 60.0; Terminal Quantity: 4; Length: 7.375 INCHES NOMINAL IN. 21 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.