The Heating Element,electrical,immer, cataloged under National Stock Number 4520-01-220-6508, 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 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-220-6508 |
| Primary Part Number | 253-117217-046 |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| Status | ACTIVE |
| Phase | THREE SINGLE VOLTAGE |
| Voltage in Volts and Current Type | 480.0 AC SINGLE VOLTAGE |
| Body Style | CIRCULAR TANK TYPE |
| Maximum Wattage Rating in Watts | 1750.0 SINGLE VOLTAGE |
| Element Connection Style | STUD TYPE |
| Mounting Method Style | TERMINAL MOUNTED |
| Heat Quantity | 1 |
| Element Radiation Spectrum | NONINFRARED |
| Element Quantity | 3 |
| 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 |
|---|---|
| 253-117217-046 PRIMARY | Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA) |
| Reference | Meaning |
|---|---|
| 157-117218-999 | D/9 Drawing number reference only Chromalox Inc Dba Chromalox Precision Heat and Control, Inc |
| 253-117217-046 | C/1 Advisory reference — outside the item-of-supply concept Chromalox Inc |
NSN 4520-01-220-6508 is a Heating Element,electrical,immer, manufactured by Chromalox Inc Dba Chromalox Precision Heat and Control, Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-220-6508 has 1 manufacturer part number on file: 253-117217-046 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
Key specifications for 253-117217-046: Phase: THREE SINGLE VOLTAGE; Voltage in Volts and Current Type: 480.0 AC SINGLE VOLTAGE; Body Style: CIRCULAR TANK TYPE; Maximum Wattage Rating in Watts: 1750.0 SINGLE VOLTAGE. 9 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.