The Duct Assembly,heating System, cataloged under National Stock Number 4520-01-376-1737, 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 Textron Systems Corp. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4520-01-376-1737 |
| Primary Part Number | 575005-198 |
| Item Name | Duct Assembly,heating System |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Textron Systems Corp |
| Status | ACTIVE |
| General Characteristics Item Description | ASSEMBLY SECTION; FLANGE MOUNTED |
| 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 |
|---|---|
| 575005-198 PRIMARY | Textron Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| 5750005 | D/9 Drawing number reference only Naval Sea Systems Command |
| 5750005-198 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 4520-01-376-1737 is a Duct Assembly,heating System, manufactured by Textron Systems Corp, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-376-1737 has 1 manufacturer part number on file: 575005-198 (Textron Systems Corp).
3 possible matches (shared part number, not a government interchangeability claim): 4520-01-376-1738, 4520-01-376-1739, 4520-01-376-2750. Verify interchangeability with system specifications before substitution.
Key specifications for 575005-198: General Characteristics Item Description: ASSEMBLY SECTION; FLANGE MOUNTED; Special Features: PART OF COLD WEATHER KIT; End Item Identification: LCAC LANDING CRAFT AIR CUSHION. 1 specification is 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.