The Hose Assembly,air Duct, cataloged under National Stock Number 4720-00-307-0396, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Kirkhill, Inc. Dba Kirkhill Inc. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4720-00-307-0396 |
| Primary Part Number | D3213 |
| Item Name | Hose Assembly,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Kirkhill, Inc. Dba Kirkhill Inc |
| Status | ACTIVE |
| Measuring Method and Length | 16.250 INCHES NOMINAL OVERALL IN |
| Connection Type | COUPLING FIRST END |
| Style Designator | FULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS |
| Coupling Style | RAISED FACE FLANGE FIRST END |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.375 INCHES NOMINAL IN |
| Inside Diameter | 3.000 INCHES NOMINAL FIRST END IN |
| Surface Treatment | ENAMEL FIRST END COUPLING |
| Material | FIBERGLASS AND RUBBER CHLOROPRENE CLASS CR SECOND PLY |
| Material | STEEL REINFORCING WIRE |
| Material | RUBBER FIRST 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 |
|---|---|
| D3213 PRIMARY | Kirkhill, Inc. Dba Kirkhill Inc (USA) |
| 20-58163-3 PRIMARY | The Boeing Company Div Defense (USA) |
| 300903-1 PRIMARY | Arrowhead Products Corp (USA) |
| Reference | Meaning |
|---|---|
| 91065 | 5/9 Secondary reference Federal-Mogul Corp Chassis Products Div |
| AL581-33 | 5/9 Secondary reference U.S. Government activity |
| 91065 | 5/9 Secondary reference Arrowhead Products Corp |
NSN 4720-00-307-0396 is a Hose Assembly,air Duct, manufactured by Kirkhill, Inc. Dba Kirkhill Inc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-00-307-0396 has 3 manufacturer part numbers on file: D3213 (Kirkhill, Inc. Dba Kirkhill Inc), 20-58163-3 (The Boeing Company Div Defense), 300903-1 (Arrowhead Products Corp).
3 possible matches (shared part number, not a government interchangeability claim): 5310-01-091-8321, 2010-01-422-9806, 5430-01-507-2574. Verify interchangeability with system specifications before substitution.
Key specifications for D3213: Measuring Method and Length: 16.250 INCHES NOMINAL OVERALL IN; Connection Type: COUPLING FIRST END; Style Designator: FULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS; Coupling Style: RAISED FACE FLANGE FIRST END. 11 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.