The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-299-0377, 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 Sea Systems Command. Government technical data includes 24 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4520-01-299-0377 |
| Primary Part Number | 5265558 |
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Phase | SINGLE SINGLE VOLTAGE |
| Frequency in Hertz | 50.0 AND 60.0 |
| Terminal Quantity | 2 |
| Length | 12.000 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 115.0 AC SINGLE VOLTAGE |
| Body Style | STRIP ELEMENT |
| Hole or Slot Quantity | 2 |
| Maximum Wattage Rating in Watts | 250.0 SINGLE VOLTAGE |
| Terminal Length | 0.560 INCHES NOMINAL IN |
| Mounting Facility Length | 0.500 INCHES NOMINAL IN |
| Element Connection Style | STUD TYPE |
| Mounting Method Style | SLOT OR HOLE TYPE MOUNTING FACILITY |
| Nominal Thread Size | 0.190 INCHES STUD IN |
| Heat Quantity | 1 |
| Terminal Arrangement Style | IN LINE (TANDEM) AT ONE END |
| Watt Density Rating | 18.0 PER SQUARE INCH SINGLE VOLTAGE |
| Element Radiation Spectrum | NONINFRARED |
| Width | 1.500 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 11.000 INCHES NOMINAL IN |
| Material | PLASTIC SHEATH |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD |
| Mounting Facility Width | 0.313 INCHES NOMINAL IN |
| Thread Quantity | 24 PER INCH STUD |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 5265558 | Naval Sea Systems Command (USA) |
| S1J12AU1 | Heat Sensor Technologie Llc (USA) |
| Reference | Meaning |
|---|---|
| S1J12AU1 | 5/9 Secondary reference Watlow Electric Manufacturing Co Dba Watlow |
| 40024A | 3/9 Design control — primary reference Watlow Electric Manufacturing Co Dba Watlow |
NSN 4520-01-299-0377 is a Heating Element,electrical,nonim, manufactured by Naval Sea Systems Command, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-299-0377 has 2 manufacturer part numbers on file: 5265558 (Naval Sea Systems Command), S1J12AU1 (Heat Sensor Technologie Llc).
Key specifications for 5265558: Phase: SINGLE SINGLE VOLTAGE; Frequency in Hertz: 50.0 AND 60.0; Terminal Quantity: 2; Length: 12.000 INCHES NOMINAL IN. 24 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.