The Heating Element,electrical,immer, cataloged under National Stock Number 4520-01-685-4500, 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 A. O. Smith Corporation Dba a. O. Smith Water Products Division Div A.o. Smith Water Products Company. Government technical data includes 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-685-4500 |
| Primary Part Number | 100109774 |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | A. O. Smith Corporation Dba a. O. Smith Water Products Division Div A.o. Smith Water Products Company |
| Status | ACTIVE |
| Terminal Quantity | 2 |
| Length | 16.500 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 480.0 AC SINGLE VOLTAGE |
| Body Style | TUBULAR, SCREW TYPE |
| Maximum Wattage Rating in Watts | 3000.0 SINGLE VOLTAGE |
| Element Connection Style | TERMINAL SCREW |
| Nominal Thread Size | 1.000 INCHES SCREW IN |
| Material | NICKEL ALLOY AND STEEL CORROSION RESISTING SHEATH |
| Thread Series Designator | NPSM SCREW |
| 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 |
|---|---|
| 100109774 PRIMARY | A. O. Smith Corporation Dba a. O. Smith Water Products Division Div A.o. Smith Water Products Company (USA) |
NSN 4520-01-685-4500 is a Heating Element,electrical,immer, manufactured by A. O. Smith Corporation Dba a. O. Smith Water Products Division Div A.o. Smith Water Products Company, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-685-4500 has 1 manufacturer part number on file: 100109774 (A. O. Smith Corporation Dba a. O. Smith Water Products Division Div A.o. Smith Water Products Company).
Key specifications for 100109774: Terminal Quantity: 2; Length: 16.500 INCHES NOMINAL IN; Voltage in Volts and Current Type: 480.0 AC SINGLE VOLTAGE; Body Style: TUBULAR, SCREW TYPE. 10 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.