The Hose,air Duct, cataloged under National Stock Number 4720-00-448-5230, 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 12 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-00-448-5230 |
| Primary Part Number | AD777B12-18 |
| 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 | 4.500 INCHES NOMINAL OVERALL IN |
| Connection Type | PLAIN BOTH ENDS |
| Style Designator | SLEEVE SECTION |
| Cross-Sectional Shape Style | ROUND |
| Operating Pressure | 15.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Inside Diameter | 3.000 INCHES NOMINAL FIRST END IN |
| Material | PLASTIC POLYAMIDE NYLON AND RUBBER SILICONE CLASS Q FIRST PLY |
| Material | PLASTIC POLYAMIDE NYLON AND RUBBER SILICONE CLASS Q FIFTH PLY |
| Material | PLASTIC POLYAMIDE NYLON AND RUBBER SILICONE CLASS Q THIRD PLY |
| Material | RUBBER FOURTH PLY |
| Material | RUBBER SECOND PLY |
| Material | RUBBER SIXTH 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 |
|---|---|
| AD777B12-18 PRIMARY | Hbd Industries, Inc Div Hbd/thermoid Inc (USA) |
| Reference | Meaning |
|---|---|
| D4410A12-18 | 5/9 Secondary reference Kirkhill, Inc. Dba Kirkhill Inc |
| FT2120A12-18 | 5/9 Secondary reference Automation Industries Inc Flexible Tubing Div |
| STSPH200B12-18 | 5/2 Secondary reference U.S. Government activity |
| LS1611A12-18 | 5/2 Secondary reference U.S. Government activity |
| BE923B12-18 | 5/9 Secondary reference Bemco, Inc |
NSN 4720-00-448-5230 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 4720-00-448-5230 has 1 manufacturer part number on file: AD777B12-18 (Hbd Industries, Inc Div Hbd/thermoid Inc).
Key specifications for AD777B12-18: Measuring Method and Length: 4.500 INCHES NOMINAL OVERALL IN; Connection Type: PLAIN BOTH ENDS; Style Designator: SLEEVE SECTION; Cross-Sectional Shape Style: ROUND. 12 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.