The Hose,air Duct, cataloged under National Stock Number 4720-01-558-7258, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Support Systems Associates, Inc.. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-558-7258 |
| Primary Part Number | 1015640-01 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Support Systems Associates, Inc. |
| Status | ACTIVE |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 4.400 INCHES NOMINAL BOTH ENDS IN |
| Inside Diameter | 4.000 INCHES NOMINAL BOTH ENDS IN |
| Material | RUBBER SILICONE CLASS Q SECOND PLY |
| Material | FIBERGLASS FIRST PLY |
| Material | RUBBER REINFORCING WIRE |
| 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 |
|---|---|
| FLX2001-16 | Flexfab Horizons International Inc. Dba Flexfab (USA) |
| FLX200132057600 | Flexfab Horizons International Inc. Dba Flexfab (USA) |
| 1015640-01 PRIMARY | Support Systems Associates, Inc. (USA) |
| MBSF-2PLY-4 | Hosexpress, Inc. (USA) |
NSN 4720-01-558-7258 is a Hose,air Duct, manufactured by Support Systems Associates, Inc., classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-558-7258 has 4 manufacturer part numbers on file: FLX2001-16 (Flexfab Horizons International Inc. Dba Flexfab), FLX200132057600 (Flexfab Horizons International Inc. Dba Flexfab), 1015640-01 (Support Systems Associates, Inc.), MBSF-2PLY-4 (Hosexpress, Inc.).
Key specifications for 1015640-01: Style Designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED; Cross-Sectional Shape Style: ROUND; Outside Diameter: 4.400 INCHES NOMINAL BOTH ENDS IN; Inside Diameter: 4.000 INCHES NOMINAL BOTH ENDS IN. 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.