The Heating Element,electrical,immer, cataloged under National Stock Number 4520-00-441-7637, 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 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4520-00-441-7637 |
| Primary Part Number | TM0-306BVWLTXX |
| 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 | 7.500 INCHES NOMINAL IN |
| Phase | SINGLE SINGLE VOLTAGE |
| Terminal Quantity | 6 |
| Length | 33.063 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 110.0 AC SINGLE VOLTAGE |
| Body Style | FLANGE, TYPE |
| Hole or Slot Quantity | 4 |
| Flange Thickness | 0.938 INCHES NOMINAL IN |
| Maximum Wattage Rating in Watts | 6000.0 SINGLE VOLTAGE |
| Element Connection Style | TERMINAL SCREW |
| Terminal Box Environmental Protection | MOISTURE RESISTANT |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Nominal Thread Size | 0.164 INCHES SCREW IN |
| Heat Quantity | 1 |
| Watt Density Rating | 8.7 PER SQUARE INCH SINGLE VOLTAGE |
| Bolt Circle Diameter | 6.000 INCHES NOMINAL IN |
| Conduit Opening Size | 1.000 INCHES NOMINAL IN |
| Element Radiation Spectrum | NONINFRARED |
| Material | STEEL SHEATH |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SCREW |
| Thread Quantity | 32.0 PER INCH SCREW |
| Hole Diameter | 0.750 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 |
|---|---|
| TM0-306BVWLTXX PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| P4266J030 | Elliott Company Div Jeannette (USA) |
| Reference | Meaning |
|---|---|
| B155-013440-999TX | D/9 Drawing number reference only Elliott Company Div Jeannette |
| TM0-306BVWLTXX11 | 5/9 Secondary reference Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| TM0-306BVWLTXX110V | C/1 Advisory reference — outside the item-of-supply concept Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
NSN 4520-00-441-7637 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 4520-00-441-7637 has 2 manufacturer part numbers on file: TM0-306BVWLTXX (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), P4266J030 (Elliott Company Div Jeannette).
Key specifications for TM0-306BVWLTXX: Flange Diameter: 7.500 INCHES NOMINAL IN; Phase: SINGLE SINGLE VOLTAGE; Terminal Quantity: 6; Length: 33.063 INCHES NOMINAL IN. 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.