The Hose,air Duct, cataloged under National Stock Number 4720-01-159-9744, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Echelon Supply and Service, Inc.. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-159-9744 |
| Primary Part Number | PN1399-SDW-TAN |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Echelon Supply and Service, Inc. |
| Status | ACTIVE |
| Measuring Method and Length | 25.000 FEET NOMINAL OVERALL FT |
| Minimum Inside Bending Radius | 8.000 INCHES IN |
| Connection Type | PLAIN FIRST END |
| Style Designator | SLEEVE SECTION |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 1.250 INCHES NOMINAL IN |
| Inside Diameter | 16.000 INCHES NOMINAL FIRST END IN |
| 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 |
|---|---|
| PN1399-SDW-TAN | Chase Supply, Inc. Dba Chase Defense Partners (USA) |
| PN1399-SDW-TAN PRIMARY | Echelon Supply and Service, Inc. (USA) |
| Reference | Meaning |
|---|---|
| M-KE 16IN ID | 5/9 Secondary reference Echelon Supply and Service, Inc. |
| 1899-HD-W | 3/9 Design control — primary reference Echelon Supply and Service, Inc. |
NSN 4720-01-159-9744 is a Hose,air Duct, manufactured by Echelon Supply and Service, Inc., classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-159-9744 has 2 manufacturer part numbers on file: PN1399-SDW-TAN (Chase Supply, Inc. Dba Chase Defense Partners), PN1399-SDW-TAN (Echelon Supply and Service, Inc.).
Key specifications for PN1399-SDW-TAN: Measuring Method and Length: 25.000 FEET NOMINAL OVERALL FT; Minimum Inside Bending Radius: 8.000 INCHES IN; Connection Type: PLAIN FIRST END; Style Designator: SLEEVE SECTION. 7 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.