The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-158-9263, 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 26 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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 | 4520-01-158-9263 |
| Primary Part Number | 118-055044-001 |
| 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 |
| Phase | SINGLE SINGLE VOLTAGE |
| Frequency in Hertz | 60.0 |
| Terminal Quantity | 2 |
| Length | 9.625 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 440.0 AC SINGLE VOLTAGE |
| Body Style | FINNED, TUBULAR, U SHAPED |
| Hole or Slot Quantity | 8 |
| Flange Thickness | 0.125 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 1.500 INCHES NOMINAL IN |
| Maximum Wattage Rating in Watts | 1140.0 SINGLE VOLTAGE |
| Mounting Facility Length | 3.594 INCHES NOMINAL IN |
| Element Connection Style | HERMETICALLY SEALED STUD |
| Material Document and Classification | MIL-H-22577 FED SPEC SINGLE MATERIAL RESPONSE SHEATH |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Nominal Thread Size | 0.250 INCHES STUD IN |
| Heat Quantity | 1 |
| Watt Density Rating | 24.2 PER SQUARE INCH SINGLE VOLTAGE |
| Element Radiation Spectrum | NONINFRARED |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 2.000 INCHES NOMINAL IN |
| Material | CHROMIUM AND NICKEL RESISTANCE WIRE |
| Material | COPPER ALLOY AND NICKEL ALLOY SHEATH |
| Thread Series Designator | UNF STUD |
| Mounting Facility Width | 4.000 INCHES NOMINAL IN |
| Thread Quantity | 28.0 PER INCH STUD |
| Hole Diameter | 0.203 INCHES NOMINAL IN |
| 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 |
|---|---|
| 210-30029-25 | Indeeco Llc Dba Indeeco (USA) |
| 106-054986 ITEM 11A | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| 118-055044-001 PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| Reference | Meaning |
|---|---|
| 106-054986-000 | D/9 Drawing number reference only Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| MIL-H-22577C | 4/1 Identification reference U.S. Government activity |
| C1387-1 | 5/9 Secondary reference Truheat Inc. |
| TA11589263 | 5/9 Secondary reference Intelliworks Ht |
| TA11589263 | 5/9 Secondary reference Tamco, Inc. Dba Technical Assistance Company Div Technical Assistance Company |
NSN 4520-01-158-9263 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 4520-01-158-9263 has 3 manufacturer part numbers on file: 210-30029-25 (Indeeco Llc Dba Indeeco), 106-054986 ITEM 11A (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), 118-055044-001 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
8 possible matches (shared part number, not a government interchangeability claim): 4520-01-162-2497, 4520-01-163-3134, 4520-01-244-4507. Verify interchangeability with system specifications before substitution.
Key specifications for 118-055044-001: Phase: SINGLE SINGLE VOLTAGE; Frequency in Hertz: 60.0; Terminal Quantity: 2; Length: 9.625 INCHES NOMINAL IN. 26 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.