The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-170-2420, 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 Valad Electric Heating Corp.. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-170-2420 |
| Primary Part Number | VDH-224-45-5-1 |
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Valad Electric Heating Corp. |
| Status | ACTIVE |
| Phase | SINGLE SINGLE VOLTAGE |
| Frequency in Hertz | 50.0 AND 60.0 |
| Terminal Quantity | 2 |
| Voltage in Volts and Current Type | 440.0 AC SINGLE VOLTAGE |
| Body Style | TUBULAR, PLAIN |
| Maximum Wattage Rating in Watts | 5500.0 SINGLE VOLTAGE |
| Element Connection Style | HERMETICALLY SEALED STUD |
| Nominal Thread Size | 0.164 INCHES STUD IN |
| Heat Quantity | 1 |
| Element Radiation Spectrum | NONINFRARED |
| Material | STEEL CORROSION RESISTING SHEATH |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD |
| Thread Quantity | 32.0 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 |
|---|---|
| 81-0427 PIECE 2 | Valad Electric Heating Corp. (USA) |
| VDH-224-45-5-1 PRIMARY | Valad Electric Heating Corp. (USA) |
| Reference | Meaning |
|---|---|
| 81-0427 | D/9 Drawing number reference only Valad Electric Heating Corp. |
NSN 4520-01-170-2420 is a Heating Element,electrical,nonim, manufactured by Valad Electric Heating Corp., classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-170-2420 has 2 manufacturer part numbers on file: 81-0427 PIECE 2 (Valad Electric Heating Corp.), VDH-224-45-5-1 (Valad Electric Heating Corp.).
2 possible matches (shared part number, not a government interchangeability claim): 3120-01-296-1990, 5935-01-461-5996. Verify interchangeability with system specifications before substitution.
Key specifications for VDH-224-45-5-1: Phase: SINGLE SINGLE VOLTAGE; Frequency in Hertz: 50.0 AND 60.0; Terminal Quantity: 2; Voltage in Volts and Current Type: 440.0 AC SINGLE VOLTAGE. 14 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.