The Heating Element,electrical,immer, cataloged under National Stock Number 4520-00-875-9845, 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 Us Army Aviation and Missile Command. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-875-9845 |
| Primary Part Number | 9177331 |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Flange Diameter | 9.188 INCHES NOMINAL IN |
| Phase | THREE SINGLE VOLTAGE |
| Frequency in Hertz | 380.0 AND 420.0 |
| Terminal Quantity | 2 |
| Length | 14.250 INCHES MINIMUM AND 14.500 INCHES MAXIMUM IN |
| Voltage in Volts and Current Type | 395.0 AC FIRST VOLTAGE |
| Voltage in Volts and Current Type | 437.0 AC SECOND VOLTAGE |
| Body Style | FLANGE TYPE |
| Hole or Slot Quantity | 8 |
| Flange Thickness | 0.375 INCHES NOMINAL IN |
| Maximum Wattage Rating in Watts | 8250.0 SINGLE VOLTAGE |
| Element Connection Style | WIRE LEAD |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Heat Quantity | 1 |
| Power Cable Nominal Length | 12.500 INCHES IN |
| Bolt Circle Diameter | 8.380 INCHES NOMINAL IN |
| Element Radiation Spectrum | NONINFRARED |
| Material | STEEL CORROSION RESISTING SHEATH |
| Hole Diameter | 0.281 INCHES NOMINAL IN |
| Element Quantity | 9 |
| 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 |
|---|---|
| 9177331 PRIMARY | Us Army Aviation and Missile Command (USA) |
| 041253-003 | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| 3-41253 | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| Reference | Meaning |
|---|---|
| TIP01145-11MAR71 | 5/2 Secondary reference U.S. Government activity |
NSN 4520-00-875-9845 is a Heating Element,electrical,immer, manufactured by Us Army Aviation and Missile Command, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-00-875-9845 has 3 manufacturer part numbers on file: 9177331 (Us Army Aviation and Missile Command), 041253-003 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), 3-41253 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
Key specifications for 9177331: Flange Diameter: 9.188 INCHES NOMINAL IN; Phase: THREE SINGLE VOLTAGE; Frequency in Hertz: 380.0 AND 420.0; Terminal Quantity: 2. 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.