The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-00-010-4959, 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 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-010-4959 |
| Primary Part Number | BSK-40004 3-40005 |
| 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 | 23.875 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 254.0 AC SINGLE VOLTAGE |
| Body Style | FINNED, TUBULAR, U SHAPED |
| Maximum Wattage Rating in Watts | 1825.0 SINGLE VOLTAGE |
| Terminal Length | 0.656 INCHES NOMINAL IN |
| Mounting Facility Length | 1.062 INCHES NOMINAL IN |
| Element Connection Style | HERMETICALLY SEALED STUD |
| Effective Heating Length | 23.875 INCHES NOMINAL IN |
| Mounting Method Style | AXIAL STUD TYPE MOUNTING FACILITY |
| Nominal Thread Size | 0.375 INCHES MOUNTING FACILITY IN |
| Heat Quantity | 1 |
| Element Radiation Spectrum | NONINFRARED |
| Material | NICKEL AND CHROMIUM RESISTANCE WIRE |
| Material | NICKEL AND COPPER SHEATH |
| Thread Series Designator | NPT MOUNTING FACILITY |
| Thread Quantity | 18.0 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 |
|---|---|
| BSK-40004 3-40005 PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| Reference | Meaning |
|---|---|
| 40005PC3 | 5/9 Secondary reference Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| 26M5F53BD | 5/9 Secondary reference Indeeco Llc Dba Indeeco |
| 3-40005FT1-51XX | 5/9 Secondary reference Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
NSN 4520-00-010-4959 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 4520-00-010-4959 has 1 manufacturer part number on file: BSK-40004 3-40005 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
Key specifications for BSK-40004 3-40005: Phase: SINGLE SINGLE VOLTAGE; Frequency in Hertz: 60.0; Terminal Quantity: 2; Length: 23.875 INCHES NOMINAL IN. 20 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.