The Hose,air Duct, cataloged under National Stock Number 4720-01-185-1177, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-185-1177 |
| Primary Part Number | 21A18-06C49-5 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites |
| Status | ACTIVE |
| Measuring Method and Length | 12.250 INCHES NOMINAL OVERALL IN |
| Minimum Inside Bending Radius | 1.500 INCHES IN |
| Connection Style | ROUND FIRST END |
| Connection Type | SOFT FIRST END |
| Style Designator | FULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.062 INCHES NOMINAL IN |
| Operating Pressure | 40.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Features Provided | OZONE RESISTANT |
| Inside Diameter | 1.500 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.250 INCHES NOMINAL FIRST END IN |
| End Inside Diameter | 1.500 INCHES NOMINAL FIRST END IN |
| Material | FIBERGLASS AND RUBBER SILICONE CLASS Q FIRST PLY |
| Material | STEEL 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 |
|---|---|
| 21A18-06C49-5 PRIMARY | Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites (USA) |
| LE271-0106-0539 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
| Reference | Meaning |
|---|---|
| 21A18-06C49-5 | 5/9 Secondary reference Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc |
| LE271-0106 | D/9 Drawing number reference only The Boeing Company Div Legacy Am&m |
NSN 4720-01-185-1177 is a Hose,air Duct, manufactured by Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-185-1177 has 2 manufacturer part numbers on file: 21A18-06C49-5 (Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites), LE271-0106-0539 (The Boeing Company Div Legacy Am&m).
5 possible matches (shared part number, not a government interchangeability claim): 4720-01-199-6579, 4720-01-462-4924, 4720-01-605-9875. Verify interchangeability with system specifications before substitution.
Key specifications for 21A18-06C49-5: Measuring Method and Length: 12.250 INCHES NOMINAL OVERALL IN; Minimum Inside Bending Radius: 1.500 INCHES IN; Connection Style: ROUND FIRST END; Connection Type: SOFT FIRST END. 14 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.