The Heating Element,electrical,immer, cataloged under National Stock Number 4520-00-997-9792, 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 18 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-997-9792 |
| Primary Part Number | TTUH403-480V |
| 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 |
| Phase | THREE SINGLE VOLTAGE |
| Terminal Quantity | 6 |
| Length | 8.500 INCHES MINIMUM AND 9.000 INCHES MAXIMUM IN |
| Voltage in Volts and Current Type | 480.0 AC SINGLE VOLTAGE |
| Body Style | BOTTOM CLAMPING |
| Hole or Slot Quantity | 1 |
| Maximum Wattage Rating in Watts | 4000.0 SINGLE VOLTAGE |
| Element Connection Style | STUD TYPE |
| Terminal Box Environmental Protection | STANDARD |
| Mounting Method Style | SLOT OR HOLE TYPE MOUNTING FACILITY |
| Heat Quantity | 3 |
| Watt Density Rating | 74.0 PER SQUARE INCH SINGLE VOLTAGE |
| Conduit Opening Size | 0.750 INCHES NOMINAL IN |
| Element Radiation Spectrum | NONINFRARED |
| Width | 3.125 INCHES NOMINAL IN |
| Material | COPPER SHEATH |
| Hole Diameter | 2.438 INCHES NOMINAL IN |
| Element Quantity | 3 |
| 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 |
|---|---|
| TTUH403-480V PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
NSN 4520-00-997-9792 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 4520-00-997-9792 has 1 manufacturer part number on file: TTUH403-480V (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
Key specifications for TTUH403-480V: Phase: THREE SINGLE VOLTAGE; Terminal Quantity: 6; Length: 8.500 INCHES MINIMUM AND 9.000 INCHES MAXIMUM IN; Voltage in Volts and Current Type: 480.0 AC SINGLE VOLTAGE. 18 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.