The Ventilator,air Circulating, cataloged under National Stock Number 5670-01-426-0423, is classified within Federal Supply Class 5670 (Building Components, Prefabricated) of the Construction and Building Materials group. The manufacturer of record is The Boeing Company. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5670-01-426-0423 |
| Primary Part Number | 7-511A21521-3 |
| Item Name | Ventilator,air Circulating |
| FSC / FSG | 5670 / 56 — Building Components, Prefabricated |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7-511A21521-3 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| E131021000 | 5/9 Secondary reference Triumph Thermal Systems - Maryland, Inc. |
| 7-511A21521-1 | 5/9 Secondary reference The Boeing Company |
NSN 5670-01-426-0423 is a Ventilator,air Circulating, manufactured by The Boeing Company, classified under FSC 5670, Building Components, Prefabricated. Status: active.
NSN 5670-01-426-0423 has 1 manufacturer part number on file: 7-511A21521-3 (The Boeing Company).
Key specifications for 7-511A21521-3: Overall Height: 7.440 INCHES NOMINAL IN; Overall Length: 7.460 INCHES NOMINAL IN; Special Features: A DEVICE DESIGNED TO ALLOW VENTILATION OF AIR WITH THE USE OF LOUVERS IN THE CREWSTATION OF THE AIRCRAFT; End Item Identification: USED ON AH-64A A. 0 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.
NSN 5670-01-426-0423 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.