The Hose,air Duct, cataloged under National Stock Number 4720-00-320-8949, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Hbd Industries, Inc Div Hbd/thermoid Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-00-320-8949 |
| Primary Part Number | AD778-12A05 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Hbd Industries, Inc Div Hbd/thermoid Inc |
| Status | ACTIVE |
| Connection Style | ROUND BOTH ENDS |
| Connection Type | SOFT BOTH ENDS |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUND |
| Inside Diameter | 3.000 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.500 INCHES NOMINAL BOTH ENDS IN |
| End Inside Diameter | 3.000 INCHES NOMINAL BOTH ENDS IN |
| Material | FIBERGLASS FIRST PLY |
| Material | RUBBER SILICONE CLASS Q REINFORCING CORD |
| 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 |
|---|---|
| AD778-12A05 | Hbd Industries, Inc Div Hbd/thermoid Inc (USA) |
| SF25-122-12A05 | Royal Engineered Composites, Inc. (USA) |
| BE913-12A05 | Bemco, Inc (USA) |
| Reference | Meaning |
|---|---|
| FT1398-12A05 | 3/9 Design control — primary reference Automation Industries Inc Flexible Tubing Div |
NSN 4720-00-320-8949 is a Hose,air Duct, manufactured by Hbd Industries, Inc Div Hbd/thermoid Inc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-00-320-8949 has 3 manufacturer part numbers on file: AD778-12A05 (Hbd Industries, Inc Div Hbd/thermoid Inc), SF25-122-12A05 (Royal Engineered Composites, Inc.), BE913-12A05 (Bemco, Inc).
Key specifications for AD778-12A05: Connection Style: ROUND BOTH ENDS; Connection Type: SOFT BOTH ENDS; Style Designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED; Cross-Sectional Shape Style: ROUND. 9 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.