The Hose,air Duct, cataloged under National Stock Number 4720-01-199-6581, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is The Boeing Company Div Legacy Am&m. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-199-6581 |
| Primary Part Number | LE271-0105-0614 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Measuring Method and Length | 6.500 INCHES NOMINAL OVERALL IN |
| Minimum Inside Bending Radius | 1.250 INCHES IN |
| Connection Style | ROUND FIRST END |
| Connection Type | PREFORMED BOTH ENDS |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.060 INCHES NOMINAL IN |
| Operating Pressure | 2.0 POUNDS PER SQUARE INCH (PSI) NOMINAL EXTERNAL LBS |
| Features Provided | OZONE RESISTANT |
| Inside Diameter | 1.250 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.500 INCHES NOMINAL BOTH ENDS IN |
| End Inside Diameter | 1.250 INCHES NOMINAL BOTH ENDS IN |
| Material | STEEL REINFORCING WIRE |
| Material | FIBERGLASS AND RUBBER SILICONE CLASS Q FIRST PLY |
| Material | FIBERGLASS AND RUBBER SILICONE CLASS Q SECOND PLY |
| 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 |
|---|---|
| LE271-0105-0614 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
| 21A18-05C26-6 PRIMARY | Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites (USA) |
| Reference | Meaning |
|---|---|
| 21A18-05C26-6 | 5/9 Secondary reference Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc |
| LE271-0105 | 7/1 Vendor item drawing reference The Boeing Company Div Legacy Am&m |
NSN 4720-01-199-6581 is a Hose,air Duct, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-199-6581 has 2 manufacturer part numbers on file: LE271-0105-0614 (The Boeing Company Div Legacy Am&m), 21A18-05C26-6 (Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-216-2322. Verify interchangeability with system specifications before substitution.
Key specifications for LE271-0105-0614: Measuring Method and Length: 6.500 INCHES NOMINAL OVERALL IN; Minimum Inside Bending Radius: 1.250 INCHES IN; Connection Style: ROUND FIRST END; Connection Type: PREFORMED BOTH ENDS. 15 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.