The Air Extractor,volume, cataloged under National Stock Number 4520-00-556-0168, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-556-0168 |
| Item Name | Air Extractor,volume |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | FULLY ADJUSTABLE,GANG OPERATED CURVED BLADES MOVE FROM FULL OPEN TO FULL CLOSED POSITIONS TO CONTROL AIR DIRECTION AND VOLUME,DISTRIBUTES AIR EVENLY TO ENTIRE GRILLE FACE AT ALL TIMES,FACTORY ASSEMBLED,RATTLE FREE,MADE OF 14 GAUGE STEEL,INSTALLS WITH TWO SCREWS,SIZE 14 IN. BY 6 IN. COMPLETE WITH AN ADAPTER FOR REGULATOR CONTROL FOR OPERATION FROM A KNOB LOCATED AT CEILING IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| AG45-14X6IN | 3/9 Design control — primary reference U.S. Government activity |
NSN 4520-00-556-0168 is a Air Extractor,volume, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-00-556-0168: General Characteristics Item Description: FULLY ADJUSTABLE,GANG OPERATED CURVED BLADES MOVE FROM FULL OPEN TO FULL CLOSED POSITIONS TO CONTROL AIR DIRECTION AND VOLUME,DISTRIBUTES AIR EVENLY TO ENTIRE GRILLE FACE AT ALL TIMES,FACTORY ASSEMBLED,RATTLE FREE,MADE OF 14 GAUGE STEEL,INSTALLS WITH TWO SCREWS,SIZE 14 IN. BY 6 IN. COMPLETE WITH AN ADAPTER FOR REGULATOR CONTROL FOR OPERATION FROM A KNOB LOCATED AT CEILING IN. 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.