The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-031-6477, 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 Dba Chromalox Precision Heat and Control, Inc. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4520-01-031-6477 |
| Primary Part Number | 118-027221-003 |
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| Status | ACTIVE |
| Phase | THREE SINGLE VOLTAGE |
| Terminal Quantity | 12 |
| Length | 6.000 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 440.0 AC SINGLE VOLTAGE |
| Body Style | FINNED, TUBULAR, U SHAPED |
| Maximum Wattage Rating in Watts | 1200.0 SINGLE VOLTAGE |
| Terminal Length | 3.250 INCHES NOMINAL IN |
| Mounting Facility Length | 0.813 INCHES NOMINAL IN |
| Element Connection Style | STUD TYPE |
| Mounting Method Style | SCREW PLUG OR BUSHING TYPE MOUNTING FACILITY |
| Nominal Thread Size | 0.250 INCHES STUD IN |
| Nominal Thread Size | 0.750 INCHES MOUNTING FACILITY IN |
| Heat Quantity | 1 |
| Element Radiation Spectrum | NONINFRARED |
| Material | NICKEL ALLOY SHEATH |
| Thread Series Designator | UNF STUD |
| Thread Series Designator | NPT MOUNTING FACILITY |
| Thread Quantity | 14.0 PER INCH MOUNTING FACILITY |
| Thread Quantity | 28.0 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 |
|---|---|
| 118-027221-003 PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| Reference | Meaning |
|---|---|
| 118-027221-003 | 5/9 Secondary reference Valad Electric Heating Corp. |
NSN 4520-01-031-6477 is a Heating Element,electrical,nonim, manufactured by Chromalox Inc Dba Chromalox Precision Heat and Control, Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-031-6477 has 1 manufacturer part number on file: 118-027221-003 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
Key specifications for 118-027221-003: Phase: THREE SINGLE VOLTAGE; Terminal Quantity: 12; Length: 6.000 INCHES NOMINAL IN; Voltage in Volts and Current Type: 440.0 AC SINGLE VOLTAGE. 20 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.