The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-491-7159, 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 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-491-7159 |
| Primary Part Number | OTF-15 |
| 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 |
| Terminal Quantity | 2 |
| Length | 11.000 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 120.0 DC SINGLE VOLTAGE |
| Body Style | STRIP, FINNED |
| Maximum Wattage Rating in Watts | 1000.0 SINGLE VOLTAGE |
| Mounting Facility Length | 1.400 INCHES NOMINAL IN |
| Element Connection Style | TERMINAL SCREW |
| Mounting Method Style | STANDOFF TYPE MOUNTING FACILITY |
| Heat Quantity | 1 |
| Terminal Arrangement Style | OFFSET OR STAGGERED AT ONE END |
| Watt Density Rating | 25.0 PER SQUARE INCH SINGLE VOLTAGE |
| Element Radiation Spectrum | NONINFRARED |
| Width | 2.000 INCHES NOMINAL IN |
| Material | IRON RUST RESISTING SHEATH |
| 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 |
|---|---|
| 2007848-002 | L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation (USA) |
| OTF-15 PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| Reference | Meaning |
|---|---|
| 2007848 | D/9 Drawing number reference only L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation |
NSN 4520-01-491-7159 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 4520-01-491-7159 has 2 manufacturer part numbers on file: 2007848-002 (L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation), OTF-15 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
1 possible match (shared part number, not a government interchangeability claim): 6150-01-552-4979. Verify interchangeability with system specifications before substitution.
Key specifications for OTF-15: Terminal Quantity: 2; Length: 11.000 INCHES NOMINAL IN; Voltage in Volts and Current Type: 120.0 DC SINGLE VOLTAGE; Body Style: STRIP, FINNED. 15 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.