The Heating Element,electrical,immer, cataloged under National Stock Number 4520-01-179-9791, 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 Cosmodyne, Llc Dba Cosmodyne Llc. Government technical data includes 21 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-179-9791 |
| Primary Part Number | 3203527-1 |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Cosmodyne, Llc Dba Cosmodyne Llc |
| Status | ACTIVE |
| Flange Diameter | 13.500 INCHES NOMINAL IN |
| Phase | THREE SINGLE VOLTAGE |
| Frequency in Hertz | 60.0 |
| Length | 53.875 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 440.0 AC SINGLE VOLTAGE |
| Body Style | FLANGE, TYPE |
| Hole or Slot Quantity | 8 |
| Flange Thickness | 1.120 INCHES NOMINAL IN |
| Maximum Wattage Rating in Watts | 50000.0 SINGLE VOLTAGE |
| Element Connection Style | TERMINAL SCREW |
| Effective Heating Length | 53.875 INCHES NOMINAL IN |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Heat Quantity | 1 |
| Watt Density Rating | 18.0 PER SQUARE INCH SINGLE VOLTAGE |
| Bolt Circle Diameter | 11.750 INCHES NOMINAL IN |
| Heat Control Type | THERMOCOUPLE |
| Conduit Opening Size | 0.750 INCHES NOMINAL IN |
| Element Radiation Spectrum | NONINFRARED |
| Material | STEEL COMP 316 SHEATH |
| Hole Diameter | 0.880 INCHES NOMINAL IN |
| Element Quantity | 18 |
| 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 |
|---|---|
| 3203527 | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| 3203527-1 PRIMARY | Cosmodyne, Llc Dba Cosmodyne Llc (USA) |
| Reference | Meaning |
|---|---|
| 3203527 | 5/9 Secondary reference Montgomery Bros Inc |
| 1WTMS1850R1XX | 3/9 Design control — primary reference Montgomery Bros Inc |
| 3203527 | D/9 Drawing number reference only Cosmodyne, Llc Dba Cosmodyne Llc |
NSN 4520-01-179-9791 is a Heating Element,electrical,immer, manufactured by Cosmodyne, Llc Dba Cosmodyne Llc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-179-9791 has 2 manufacturer part numbers on file: 3203527 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), 3203527-1 (Cosmodyne, Llc Dba Cosmodyne Llc).
Key specifications for 3203527-1: Flange Diameter: 13.500 INCHES NOMINAL IN; Phase: THREE SINGLE VOLTAGE; Frequency in Hertz: 60.0; Length: 53.875 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.