The Heating Element,electrical,immer, cataloged under National Stock Number 4520-01-499-9757, 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. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-499-9757 |
| Primary Part Number | 155-073098-006 |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc |
| Status | ACTIVE |
| Flange Diameter | 11.000 INCHES NOMINAL IN |
| Phase | SINGLE OR TWO OR THREE SINGLE VOLTAGE |
| Frequency in Hertz | 60.0 |
| Length | 30.000 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 440.0 AC SINGLE VOLTAGE |
| Body Style | TUBULAR, FLANGED |
| Hole or Slot Quantity | 8 |
| Flange Thickness | 1.000 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 9.500 INCHES NOMINAL IN |
| Maximum Wattage Rating in Watts | 17000.0 SINGLE VOLTAGE |
| Mounting Facility Length | 11.000 INCHES NOMINAL IN |
| Element Connection Style | ODD/IRREGULAR SHAPED ITEMS |
| Material Document and Classification | QQ-R-175, COMP E OR ASTM B344 FED SPEC SINGLE MATERIAL RESPONSE RESISTANCE WIRE |
| Terminal Box Environmental Protection | EXPLOSION RESISTANT AND MOISTURE RESISTANT |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Heat Quantity | 1 |
| Watt Density Rating | 18.0 PER SQUARE INCH SINGLE VOLTAGE |
| Bolt Circle Diameter | 9.250 INCHES NOMINAL IN |
| Element Radiation Spectrum | NONINFRARED |
| Material | NICKEL ALLOY RESISTANCE WIRE |
| Mounting Facility Width | 11.000 INCHES NOMINAL IN |
| Hole Diameter | 0.875 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 |
|---|---|
| 155-073098-006 PRIMARY | Chromalox Inc (USA) |
| 155-073098-006 REV 1 | Chromalox Inc (USA) |
NSN 4520-01-499-9757 is a Heating Element,electrical,immer, manufactured by Chromalox Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-499-9757 has 2 manufacturer part numbers on file: 155-073098-006 (Chromalox Inc), 155-073098-006 REV 1 (Chromalox Inc).
Key specifications for 155-073098-006: Flange Diameter: 11.000 INCHES NOMINAL IN; Phase: SINGLE OR TWO OR THREE SINGLE VOLTAGE; Frequency in Hertz: 60.0; Length: 30.000 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.