The Collar,air Conditioning-Heating, cataloged under National Stock Number 4520-01-505-2090, 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. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-505-2090 |
| Primary Part Number | 512-7067298-F28 |
| Item Name | Collar,air Conditioning-Heating |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Fitting Inside Height | 3.000 INCHES NOMINAL IN |
| Overall Thickness | 0.125 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR OR SQUARE |
| Sheet Metal Gage Size | 30 |
| Fitting Inside Width | 6.000 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| 512-7067298-F28 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H643-2601-F28 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4520-01-505-2090 is a Collar,air Conditioning-Heating, manufactured by Naval Sea Systems Command, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-505-2090 has 1 manufacturer part number on file: 512-7067298-F28 (Naval Sea Systems Command).
Key specifications for 512-7067298-F28: Fitting Inside Height: 3.000 INCHES NOMINAL IN; Overall Thickness: 0.125 INCHES NOMINAL IN; Style Designator: RECTANGULAR OR SQUARE; Overall Length: 9.100 INCHES NOMINAL IN. 6 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.