The Hose,air Duct, cataloged under National Stock Number 4720-01-320-1246, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Arrowhead Products Corp. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-320-1246 |
| Primary Part Number | 713685H12-56A |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Arrowhead Products Corp |
| Status | ACTIVE |
| Measuring Method and Length | 14.000 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND BOTH ENDS |
| Connection Type | SOFT BOTH ENDS |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Material Document and Classification | MIL-R-6855,CLASS 2,GRADE 60 MIL SPEC SINGLE MATERIAL RESPONSE COVER |
| Material Document and Classification | MIL-R-6855,CLASS 2,GRADE 60 MIL SPEC SINGLE MATERIAL RESPONSE FIRST PLY |
| Material Document and Classification | QQ-W-461 FED SPEC SINGLE MATERIAL RESPONSE REINFORCING WIRE |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.050 INCHES NOMINAL IN |
| Operating Pressure | 1.1 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Inside Diameter | 3.000 INCHES NOMINAL FIRST END IN |
| End Overall Length | 3.000 INCHES NOMINAL BOTH ENDS IN |
| End Inside Diameter | 3.000 INCHES NOMINAL BOTH ENDS IN |
| Material | STEEL REINFORCING WIRE |
| Material | FIBERGLASS REINFORCING CORD |
| Material | RUBBER CHLOROPRENE CLASS CR AND FIBERGLASS FIRST PLY |
| Material | RUBBER CHLOROPRENE CLASS CR AND FIBERGLASS 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 |
|---|---|
| 713685H12-56A PRIMARY | Arrowhead Products Corp (USA) |
| DOU107324005606 PRIMARY | Flexfab Llc (USA) |
| IT-5037H12-56A PRIMARY | Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 7D0105 | D/9 Drawing number reference only U.S. Government activity |
| 7D0105H12-56A | 3/2 Design control — primary reference U.S. Government activity |
| 7D0105H12-56A | 5/9 Secondary reference The Boeing Company Div Defense |
| 71368H12-56A | 5/9 Secondary reference Arrowhead Products Corp |
NSN 4720-01-320-1246 is a Hose,air Duct, manufactured by Arrowhead Products Corp, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-320-1246 has 3 manufacturer part numbers on file: 713685H12-56A (Arrowhead Products Corp), DOU107324005606 (Flexfab Llc), IT-5037H12-56A (Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc).
Key specifications for 713685H12-56A: Measuring Method and Length: 14.000 INCHES NOMINAL OVERALL IN; Connection Style: ROUND BOTH ENDS; Connection Type: SOFT BOTH ENDS; Style Designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED. 17 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.