The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-516-3535, 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 National Oilwell Varco Inc Dba National Oilwell. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Manufacturers | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (CAGE 65586); National Oilwell Varco Inc Dba National Oilwell (CAGE 52142) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-516-3535 |
| Primary Part Number | 15A00412-0000 ITEM 45 |
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | National Oilwell Varco Inc Dba National Oilwell |
| Status | ACTIVE |
| 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 |
|---|---|
| 600009284 | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| 15A00412-0000 ITEM 45 PRIMARY | National Oilwell Varco Inc Dba National Oilwell (USA) |
| OTF-12V 750W 480VAC | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| Reference | Meaning |
|---|---|
| 15A00412-0000 | D/9 Drawing number reference only National Oilwell Varco Inc Dba National Oilwell |
NSN 4520-01-516-3535 is a Heating Element,electrical,nonim, manufactured by National Oilwell Varco Inc Dba National Oilwell, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-516-3535 has 3 manufacturer part numbers on file: 600009284 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), 15A00412-0000 ITEM 45 (National Oilwell Varco Inc Dba National Oilwell), OTF-12V 750W 480VAC (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5999-01-516-6503, 6685-01-540-0792. Verify interchangeability with system specifications before substitution.
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.