The Hose,air Duct, cataloged under National Stock Number 4720-00-945-4644, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is General Dynamics Mission Systems, Inc. Dba Gdms. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-00-945-4644 |
| Primary Part Number | 75-31458B01 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | General Dynamics Mission Systems, Inc. Dba Gdms |
| Status | ACTIVE |
| Measuring Method and Length | 5.500 INCHES NOMINAL OVERALL IN |
| Temp Rating | -40.0 FAHRENHEIT AND 167.0 FAHRENHEIT DEGF |
| Connection Type | PLAIN BOTH ENDS |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.084 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN |
| Operating Pressure | 10.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Features Provided | OZONE RESISTANT |
| Inside Diameter | 1.990 INCHES NOMINAL FIRST END IN |
| Material | STEEL REINFORCING WIRE |
| Material | PLASTIC POLYVINYL FIRST 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 |
|---|---|
| 75-31458B01 PRIMARY | General Dynamics Mission Systems, Inc. Dba Gdms (USA) |
| Reference | Meaning |
|---|---|
| 75-31458B01 | 5/9 Secondary reference U.S. Government activity |
NSN 4720-00-945-4644 is a Hose,air Duct, manufactured by General Dynamics Mission Systems, Inc. Dba Gdms, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-00-945-4644 has 1 manufacturer part number on file: 75-31458B01 (General Dynamics Mission Systems, Inc. Dba Gdms).
Key specifications for 75-31458B01: Measuring Method and Length: 5.500 INCHES NOMINAL OVERALL IN; Temp Rating: -40.0 FAHRENHEIT AND 167.0 FAHRENHEIT DEGF; Connection Type: PLAIN BOTH ENDS; Style Designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED. 11 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.