The Hose,air Duct, cataloged under National Stock Number 4720-00-217-6821, is classified within Federal Supply Class 4720 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Arrowhead Products Corp. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-00-217-6821 |
| Primary Part Number | 3-1664-22-96-6 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — No Item Name Available |
| Manufacturer | Arrowhead Products Corp |
| Status | ACTIVE |
| Connection Type | SOFT FIRST END |
| Material | FIBERGLASS AND RUBBER SILICONE CLASS Q THIRD PLY |
| End Overall Length | 1.500 INCHES NOMINAL FIRST END IN |
| End Inside Diameter | 2.750 INCHES NOMINAL FIRST END IN |
| Cross-Sectional Shape Style | ROUND |
| Material | FIBERGLASS AND RUBBER SILICONE CLASS Q FIRST PLY |
| Operating Pressure | 5.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Material | FIBERGLASS AND RUBBER SILICONE CLASS Q REINFORCING CORD |
| Measuring Method and Length | 24.000 INCHES NOMINAL OVERALL IN |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Inside Diameter | 2.750 INCHES NOMINAL FIRST END IN |
| Material | STEEL CORROSION RESISTING SECOND PLY |
| Connection Style | ROUND FIRST END |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 3-1664 | Arrowhead Products Corp (USA) |
| 3-1664-22-96-6 PRIMARY | Arrowhead Products Corp (USA) |
| 8B783057 | Hiller Aircraft Corporation (USA) |
| 8B783057-21 PRIMARY | Hiller Aircraft Corporation (USA) |
NSN 4720-00-217-6821 is a Hose,air Duct, manufactured by Arrowhead Products Corp, classified under FSC 4720 (No Item Name Available). Status: active.
NSN 4720-00-217-6821 has 4 cross-referenced part numbers: 3-1664 (Arrowhead Products Corp), 3-1664-22-96-6 (Arrowhead Products Corp), 8B783057 (Hiller Aircraft Corporation), 8B783057-21 (Hiller Aircraft Corporation).
There are 12 known substitutes for 4720-00-217-6821: 5940-00-107-1481, 5110-00-156-0063, 4720-00-217-6815 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 3-1664-22-96-6: Connection Type: SOFT FIRST END; Material: FIBERGLASS AND RUBBER SILICONE CLASS Q THIRD PLY; End Overall Length: 1.500 INCHES NOMINAL FIRST END IN; End Inside Diameter: 2.750 INCHES NOMINAL FIRST END IN. 13 total characteristics are documented in the Federal Logistics Information System.