The Hose,air Duct, cataloged under National Stock Number 4720-01-462-1822, 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 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4720-01-462-1822 |
| Primary Part Number | 21A18-04C21-4 |
| 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 | 4.025 INCHES NOMINAL OVERALL IN |
| Inside Length | 3.125 INCHES NOMINAL FIRST END IN |
| Connection Style | RECTANGULAR BOTH ENDS |
| Connection Type | SOFT BOTH ENDS |
| Style Designator | FULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.060 INCHES NOMINAL IN |
| Operating Pressure | 65.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Inside Diameter | 1.000 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.000 INCHES NOMINAL BOTH ENDS IN |
| End Inside Diameter | 1.000 INCHES NOMINAL BOTH ENDS IN |
| Material | FIBERGLASS ALL PLIES |
| 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 |
|---|---|
| 21A18-04C21-4 PRIMARY | Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites (USA) |
| LE271-0104-0413 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
| Reference | Meaning |
|---|---|
| LE271-0104 | 7/1 Vendor item drawing reference The Boeing Company Div Legacy Am&m |
| 21A18-04C21-4 | 5/9 Secondary reference Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc |
NSN 4720-01-462-1822 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 4720-01-462-1822 has 2 manufacturer part numbers on file: 21A18-04C21-4 (Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites), LE271-0104-0413 (The Boeing Company Div Legacy Am&m).
2 possible matches (shared part number, not a government interchangeability claim): 4720-01-471-5521, 4720-01-535-0448. Verify interchangeability with system specifications before substitution.
Key specifications for 21A18-04C21-4: Measuring Method and Length: 4.025 INCHES NOMINAL OVERALL IN; Inside Length: 3.125 INCHES NOMINAL FIRST END IN; Connection Style: RECTANGULAR BOTH ENDS; Connection Type: SOFT BOTH ENDS. 12 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.