The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-00-990-2397, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4520-00-990-2397 |
| Primary Part Number | 3-111727 |
| 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 | NOT RATED SINGLE VOLTAGE |
| Terminal Quantity | 2 |
| Voltage in Volts and Current Type | 254.0 AC SINGLE VOLTAGE |
| Body Style | ODD/IRREGULAR SHAPED ITEMS |
| Hole or Slot Quantity | 4 |
| Flange Thickness | 0.125 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 16.375 INCHES NOMINAL IN |
| Maximum Wattage Rating in Watts | 334.0 SINGLE VOLTAGE |
| Terminal Length | 0.750 INCHES NOMINAL IN |
| Mounting Facility Length | 17.000 INCHES NOMINAL IN |
| Element Connection Style | STUD TYPE |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Nominal Thread Size | 0.164 INCHES STUD IN |
| Heat Quantity | 1 |
| Element Radiation Spectrum | NONINFRARED |
| Width | 5.125 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 4.125 INCHES NOMINAL IN |
| Material | ALUMINUM SHEATH |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD |
| Mounting Facility Width | 5.125 INCHES NOMINAL IN |
| Thread Quantity | 32.0 PER INCH STUD |
| Hole Diameter | 0.250 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 |
|---|---|
| 3-111727 PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| Reference | Meaning |
|---|---|
| 393-111727-003 | 5/9 Secondary reference Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
NSN 4520-00-990-2397 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 4520-00-990-2397 has 1 manufacturer part number on file: 3-111727 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
Key specifications for 3-111727: Phase: NOT RATED SINGLE VOLTAGE; Terminal Quantity: 2; Voltage in Volts and Current Type: 254.0 AC SINGLE VOLTAGE; Body Style: ODD/IRREGULAR SHAPED ITEMS. 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.