The Hose,air Duct, cataloged under National Stock Number 4720-01-009-9075, 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 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 4720-01-009-9075 |
| Primary Part Number | AD778-11A17 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Hbd Industries, Inc Div Hbd/thermoid Inc |
| Status | ACTIVE |
| Measuring Method and Length | 17.000 INCHES NOMINAL OVERALL IN |
| Minimum Inside Bending Radius | 1.375 INCHES IN |
| Connection Style | ROUND FIRST END |
| Connection Type | SOFT FIRST END |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.075 INCHES MAXIMUM IN |
| Operating Pressure | 35.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Features Provided | OZONE RESISTANT |
| Inside Diameter | 2.750 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.500 INCHES NOMINAL FIRST END IN |
| End Inside Diameter | 2.750 INCHES NOMINAL FIRST END IN |
| Material | FIBERGLASS AND RUBBER CHLOROPRENE CLASS CR SECOND PLY |
| Material | FIBERGLASS AND RUBBER CHLOROPRENE CLASS CR FIRST PLY |
| Material | FIBERGLASS AND RUBBER CHLOROPRENE CLASS CR FOURTH PLY |
| Material | STEEL THIRD 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 |
|---|---|
| AD778-11A17 | Hbd Industries, Inc Div Hbd/thermoid Inc (USA) |
| Reference | Meaning |
|---|---|
| AD778 | D/9 Drawing number reference only Hbd Industries, Inc Div Hbd/thermoid Inc |
| AD778-11A17 | 3/2 Design control — primary reference U.S. Government activity |
| STSPH100-11A17 | 5/9 Secondary reference Lockheed Martin Corp |
NSN 4720-01-009-9075 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 4720-01-009-9075 has 1 manufacturer part number on file: AD778-11A17 (Hbd Industries, Inc Div Hbd/thermoid Inc).
5 possible matches (shared part number, not a government interchangeability claim): 4720-01-071-9890, 4720-01-245-3676, 4720-01-245-3677. Verify interchangeability with system specifications before substitution.
Key specifications for AD778-11A17: Measuring Method and Length: 17.000 INCHES NOMINAL OVERALL IN; Minimum Inside Bending Radius: 1.375 INCHES IN; Connection Style: ROUND FIRST END; Connection Type: SOFT FIRST END. 16 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.