The Heating Element,electrical,nonim, cataloged under National Stock Number 4520-00-489-4886, 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. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-489-4886 |
| Primary Part Number | TGA1157 |
| 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 |
| Length | 10.562 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 240.0 AC SINGLE VOLTAGE |
| Body Style | TUBULAR, FLANGED |
| Hole or Slot Quantity | 4 |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 1.766 INCHES NOMINAL IN |
| Maximum Wattage Rating in Watts | 1500.0 SINGLE VOLTAGE |
| Mounting Facility Length | 2.500 INCHES NOMINAL IN |
| Element Connection Style | TERMINAL SCREW |
| Effective Heating Length | 10.562 INCHES NOMINAL IN |
| Mounting Method Style | FLANGE TYPE MOUNTING FACILITY |
| Nominal Thread Size | 0.190 INCHES SCREW IN |
| Heat Quantity | 1 |
| Watt Density Rating | 75.0 PER SQUARE INCH SINGLE VOLTAGE |
| Element Radiation Spectrum | NONINFRARED |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.766 INCHES NOMINAL IN |
| Material | COPPER SHEATH |
| Thread Series Designator | UNF SCREW |
| Mounting Facility Width | 2.500 INCHES NOMINAL IN |
| Thread Quantity | 32.0 PER INCH SCREW |
| Hole Diameter | 1.766 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 |
NSN 4520-00-489-4886 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 4520-00-489-4886 has 2 manufacturer part numbers on file: TGA1157 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), 25705 (Alter Harry Co the Div of T E C).
5 possible matches (shared part number, not a government interchangeability claim): 4310-00-646-8069, 5950-00-648-4079, 6515-01-227-7037. Verify interchangeability with system specifications before substitution.
Key specifications for TGA1157: Phase: NOT RATED SINGLE VOLTAGE; Terminal Quantity: 2; Length: 10.562 INCHES NOMINAL IN; Voltage in Volts and Current Type: 240.0 AC SINGLE VOLTAGE. 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.