The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-478-3522, 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 American Permanent Ware Company Dba Apw/wyott Foodservice Eqp Co. Government technical data includes 10 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. 3 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 | 4520-01-478-3522 |
| Primary Part Number | 55959 |
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | American Permanent Ware Company Dba Apw/wyott Foodservice Eqp Co |
| Status | ACTIVE |
| Phase | SINGLE SINGLE VOLTAGE |
| Frequency in Hertz | 60.0 |
| Voltage in Volts and Current Type | 120.0 AC SINGLE VOLTAGE |
| Body Style | TUBULAR, DOUBLE TERMINALS |
| Maximum Wattage Rating in Watts | 500.0 SINGLE VOLTAGE |
| Element Connection Style | EYELET |
| Heat Quantity | 2 |
| Heat Control Type | THERMOSTAT |
| Element Radiation Spectrum | NONINFRARED |
| 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 |
|---|---|
| 55959 PRIMARY | American Permanent Ware Company Dba Apw/wyott Foodservice Eqp Co (USA) |
| SM-50 ITEM NO. 5 | American Permanent Ware Company Dba Apw/wyott Foodservice Eqp Co (USA) |
NSN 4520-01-478-3522 is a Heating Element,electrical,nonim, manufactured by American Permanent Ware Company Dba Apw/wyott Foodservice Eqp Co, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-478-3522 has 2 manufacturer part numbers on file: 55959 (American Permanent Ware Company Dba Apw/wyott Foodservice Eqp Co), SM-50 ITEM NO. 5 (American Permanent Ware Company Dba Apw/wyott Foodservice Eqp Co).
3 possible matches (shared part number, not a government interchangeability claim): 5995-01-496-3875, 5998-01-558-9998, 1650-01-616-3684. Verify interchangeability with system specifications before substitution.
Key specifications for 55959: Phase: SINGLE SINGLE VOLTAGE; Frequency in Hertz: 60.0; Voltage in Volts and Current Type: 120.0 AC SINGLE VOLTAGE; Body Style: TUBULAR, DOUBLE TERMINALS. 10 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.