The Hose,air Duct, cataloged under National Stock Number 4720-01-028-4539, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Bemco, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-028-4539 |
| Primary Part Number | BE725-16-18-6 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Bemco, Inc |
| Status | ACTIVE |
| Measuring Method and Length | 4.500 INCHES NOMINAL OVERALL IN |
| Minimum Inside Bending Radius | 8.000 INCHES IN |
| Connection Style | ROUND FIRST END |
| Connection Type | SOFT FIRST END |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUND |
| Inside Diameter | 7.500 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.500 INCHES NOMINAL FIRST END IN |
| End Inside Diameter | 4.000 INCHES NOMINAL FIRST END IN |
| Material | RUBBER CHLOROPRENE CLASS CR COVER |
| Material | FIBERGLASS FIRST PLY |
| Material | PLASTIC POLYAMIDE NYLON 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 |
|---|---|
| BE725-16-18-6 PRIMARY | Bemco, Inc (USA) |
| Reference | Meaning |
|---|---|
| BACD40K16-018A6 | 5/2 Secondary reference U.S. Government activity |
| BACD40K | D/9 Drawing number reference only U.S. Government activity |
| AD1073 | 5/1 Secondary reference Hbd Industries, Inc Div Hbd/thermoid Inc |
NSN 4720-01-028-4539 is a Hose,air Duct, manufactured by Bemco, Inc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-028-4539 has 1 manufacturer part number on file: BE725-16-18-6 (Bemco, Inc).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-064-7922. Verify interchangeability with system specifications before substitution.
Key specifications for BE725-16-18-6: Measuring Method and Length: 4.500 INCHES NOMINAL OVERALL IN; Minimum Inside Bending Radius: 8.000 INCHES IN; Connection Style: ROUND FIRST END; Connection Type: SOFT FIRST END. 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.