The Quadrant,damper Control, cataloged under National Stock Number 4520-01-503-4290, 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 Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4520-01-503-4290 |
| Primary Part Number | 24-070-021 |
| Item Name | Quadrant,damper Control |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
| Status | ACTIVE |
| Voltage in Volts and Current Type | 120.0 AC |
| Surface Treatment | ZINC |
| Material | STEEL |
| 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 |
|---|---|
| 24-070-021 PRIMARY | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| Reference | Meaning |
|---|---|
| LF120 US | 5/9 Secondary reference Belimo Aircontrols /usa/ Inc |
| 1298-10-D FIND 4 | D/9 Drawing number reference only Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
NSN 4520-01-503-4290 is a Quadrant,damper Control, manufactured by Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-503-4290 has 1 manufacturer part number on file: 24-070-021 (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil).
Key specifications for 24-070-021: Overall Height: 3.860 INCHES NOMINAL IN; Voltage in Volts and Current Type: 120.0 AC; Overall Length: 7.670 INCHES NOMINAL IN; Overall Width: 2.740 INCHES NOMINAL IN. 3 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.