The Heating Element,electrical,immer, cataloged under National Stock Number 4520-00-987-7925, 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 23 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-987-7925 |
| Primary Part Number | 29X13478FAX |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| Status | ACTIVE |
| Flange Diameter | 10.000 INCHES NOMINAL IN |
| Phase | THREE SINGLE VOLTAGE |
| Frequency in Hertz | 60.0 |
| Terminal Quantity | 12 |
| Length | 33.250 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 220.0 AC SINGLE VOLTAGE |
| Body Style | TUBULAR, FLANGED |
| Hole or Slot Quantity | 8 |
| Flange Thickness | 0.938 INCHES NOMINAL IN |
| Maximum Wattage Rating in Watts | 10200.0 SINGLE VOLTAGE |
| Terminal Length | 0.656 INCHES NOMINAL IN |
| Element Connection Style | STUD TYPE |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Nominal Thread Size | 0.250 INCHES STUD IN |
| Heat Quantity | 1 |
| Bolt Circle Diameter | 8.500 INCHES NOMINAL IN |
| Element Radiation Spectrum | NONINFRARED |
| Material | NICKEL ALLOY RESISTANCE WIRE |
| Material | STEEL SHEATH |
| Thread Series Designator | UNF STUD |
| Thread Quantity | 28.0 PER INCH STUD |
| Hole Diameter | 0.875 INCHES NOMINAL IN |
| Element Quantity | 6 |
| 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 |
|---|---|
| TMO6125VWXX | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| 29X13478FAX PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| AP13478FAX | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| Reference | Meaning |
|---|---|
| AP13478 | 5/1 Secondary reference Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
NSN 4520-00-987-7925 is a Heating Element,electrical,immer, manufactured by Chromalox Inc Dba Chromalox Precision Heat and Control, Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-00-987-7925 has 3 manufacturer part numbers on file: TMO6125VWXX (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), 29X13478FAX (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), AP13478FAX (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
Key specifications for 29X13478FAX: Flange Diameter: 10.000 INCHES NOMINAL IN; Phase: THREE SINGLE VOLTAGE; Frequency in Hertz: 60.0; Terminal Quantity: 12. 23 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.