The Hose,air Duct, cataloged under National Stock Number 4720-01-454-7904, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Bull Hn Information Systems Inc. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 — Hose and Flexible Tubing (FSG 47) |
| Manufacturers | Bull Hn Information Systems Inc (CAGE 53178); The Boeing Company (CAGE 8V613); Flexfab Llc (CAGE 16632) |
| Parameter | Value |
|---|---|
| NSN | 4720-01-454-7904 |
| Primary Part Number | BWT11920-35 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Bull Hn Information Systems Inc |
| 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 |
|---|---|
| BWT11920-35 PRIMARY | Bull Hn Information Systems Inc (USA) |
| 7-511A21568-17 | The Boeing Company (USA) |
| DOU1143-0017 PRIMARY | Flexfab Llc (USA) |
| Reference | Meaning |
|---|---|
| 7-511A21568 | D/9 Drawing number reference only The Boeing Company |
NSN 4720-01-454-7904 is a Hose,air Duct, manufactured by Bull Hn Information Systems Inc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-454-7904 has 3 manufacturer part numbers on file: BWT11920-35 (Bull Hn Information Systems Inc), 7-511A21568-17 (The Boeing Company), DOU1143-0017 (Flexfab Llc).
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 4720-01-454-7904 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.