The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-01-377-7449, 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 Indeeco Llc Dba Indeeco. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 4520-01-377-7449 |
| Primary Part Number | 53440 |
| Item Name | Heating Element,electrical,nonim |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Indeeco Llc Dba Indeeco |
| Status | ACTIVE |
| Terminal Quantity | 2 |
| Length | 30.000 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 277.0 AC SINGLE VOLTAGE |
| Body Style | FINNED, TUBULAR, U SHAPED |
| Maximum Wattage Rating in Watts | 3700.0 SINGLE VOLTAGE |
| Element Connection Style | STUD TYPE |
| Mounting Method Style | AXIAL STUD TYPE MOUNTING FACILITY |
| Nominal Thread Size | 0.750 INCHES MOUNTING FACILITY IN |
| Heat Quantity | 1 |
| Heat Control Type | THERMOSTAT |
| Element Radiation Spectrum | NONINFRARED |
| Material | STEEL COMP 304 SHEATH |
| Thread Series Designator | UNF MOUNTING FACILITY |
| Thread Quantity | 16 PER INCH MOUNTING FACILITY |
| 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 |
|---|---|
| 53440 PRIMARY | Indeeco Llc Dba Indeeco (USA) |
| Reference | Meaning |
|---|---|
| L210A0:B10039 | D/9 Drawing number reference only Indeeco Llc Dba Indeeco |
NSN 4520-01-377-7449 is a Heating Element,electrical,nonim, manufactured by Indeeco Llc Dba Indeeco, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-377-7449 has 1 manufacturer part number on file: 53440 (Indeeco Llc Dba Indeeco).
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-533-6787, 4820-01-533-6788, 4820-01-533-6877. Verify interchangeability with system specifications before substitution.
Key specifications for 53440: Terminal Quantity: 2; Length: 30.000 INCHES NOMINAL IN; Voltage in Volts and Current Type: 277.0 AC SINGLE VOLTAGE; Body Style: FINNED, TUBULAR, U SHAPED. 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.