The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-357-7017, 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 Chromalox Inc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-357-7017 |
| Primary Part Number | 118-056222-105 |
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc |
| Status | ACTIVE |
| Phase | THREE SINGLE VOLTAGE |
| Frequency in Hertz | 60.0 |
| Terminal Quantity | 2 |
| Length | 8.438 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 254.0 AC SINGLE VOLTAGE |
| Body Style | TUBULAR, U SHAPED |
| Maximum Wattage Rating in Watts | 643.0 SINGLE VOLTAGE |
| Element Connection Style | HERMETICALLY SEALED STUD |
| Mounting Method Style | AXIAL STUD TYPE MOUNTING FACILITY |
| Nominal Thread Size | 0.250 INCHES STUD IN |
| Heat Quantity | 3 |
| Element Radiation Spectrum | NONINFRARED |
| Material | COPPER ALLOY AND NICKEL SHEATH |
| Thread Series Designator | UNF STUD |
| Thread Quantity | 28.0 PER INCH STUD |
| Element Quantity | 3 |
| 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 |
|---|---|
| 118-056222-105 PRIMARY | Chromalox Inc (USA) |
| Reference | Meaning |
|---|---|
| 106-302111-000 | D/9 Drawing number reference only Chromalox Inc |
NSN 4520-01-357-7017 is a Heating Element,electrical,nonim, manufactured by Chromalox Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-357-7017 has 1 manufacturer part number on file: 118-056222-105 (Chromalox Inc).
Key specifications for 118-056222-105: Phase: THREE SINGLE VOLTAGE; Frequency in Hertz: 60.0; Terminal Quantity: 2; Length: 8.438 INCHES NOMINAL IN. 16 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.