The Hose,air Duct, cataloged under National Stock Number 4720-01-628-2643, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc (CAGE 14711); The Boeing Company Div Legacy Am&m (CAGE 43999) |
| Parameter | Value |
|---|---|
| NSN | 4720-01-628-2643 |
| Primary Part Number | 21A18-06C23-6 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc |
| 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 |
|---|---|
| 21A18-06C23-6 PRIMARY | Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc (USA) |
| LE271-0106-0611 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
| Reference | Meaning |
|---|---|
| LE271-0106 | 7/2 Vendor item drawing reference The Boeing Company Div Legacy Am&m |
| NAS1369 | 3/1 Design control — primary reference U.S. Government activity |
| NAS1374A06SM017 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4720-01-628-2643 is a Hose,air Duct, manufactured by Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-628-2643 has 2 manufacturer part numbers on file: 21A18-06C23-6 (Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc), LE271-0106-0611 (The Boeing Company Div Legacy Am&m).
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.