The Heating Element,electrical,immer, cataloged under National Stock Number 4520-01-358-3955, 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 Naval Inventory Control Point Mechanicsburg. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-358-3955 |
| Primary Part Number | 155-500771-054VM |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Phase | THREE SINGLE VOLTAGE |
| Frequency in Hertz | 60.0 |
| Terminal Quantity | 2 |
| Length | 33.938 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 440.0 AC SINGLE VOLTAGE |
| Body Style | TUBULAR, FLANGED, W/TERMINALS |
| Maximum Wattage Rating in Watts | 12000.0 SINGLE VOLTAGE |
| Terminal Length | 1.000 INCHES NOMINAL IN |
| Element Connection Style | ROUND BAYONET |
| Criticality Code Justification | ZZZY |
| Heat Quantity | 1 |
| Element Radiation Spectrum | NONINFRARED |
| Material | STEEL RESISTANCE WIRE |
| Element Quantity | 3 |
| Reference Number Differentiating Characteristics | MAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 155-500771-054VM | Naval Inventory Control Point Mechanicsburg (USA) |
| 054-552505-999 F | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 155-500771-054 | 3/1 Design control — primary reference Chromalox Inc |
| 054-552505-999 FIND 1 | 5/1 Secondary reference Chromalox Inc |
NSN 4520-01-358-3955 is a Heating Element,electrical,immer, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-358-3955 has 2 manufacturer part numbers on file: 155-500771-054VM (Naval Inventory Control Point Mechanicsburg), 054-552505-999 F (Naval Inventory Control Point Mechanicsburg).
Key specifications for 155-500771-054VM: Phase: THREE SINGLE VOLTAGE; Frequency in Hertz: 60.0; Terminal Quantity: 2; Length: 33.938 INCHES NOMINAL IN. 15 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.