The Terminal,ventilation Duct, cataloged under National Stock Number 4520-01-715-6524, 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 Naval Sea Systems Command. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Terminal,ventilation Duct |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Manufacturers | Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-715-6524 |
| Primary Part Number | 512-8837250-A3 |
| Item Name | Terminal,ventilation Duct |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| 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 |
|---|---|
| 512-8841543-F21 | Naval Sea Systems Command (USA) |
| 512-8837250-A3 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| LOA012303/D-F21 | 5/2 Secondary reference U.S. Government activity |
| LSA005044/B-A3 | 5/2 Secondary reference U.S. Government activity |
| 512-8841543 | D/9 Drawing number reference only Naval Sea Systems Command |
| R6432612-A3 | 5/2 Secondary reference U.S. Government activity |
| 8837250 REV B SHEET 14 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4520-01-715-6524 is a Terminal,ventilation Duct, manufactured by Naval Sea Systems Command, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-715-6524 has 2 manufacturer part numbers on file: 512-8841543-F21 (Naval Sea Systems Command), 512-8837250-A3 (Naval Sea Systems Command).
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.