The Hose,air Duct, cataloged under National Stock Number 4720-01-644-7073, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-644-7073 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| Inside Width | 0.750 INCHES MINIMUM AND 1.000 INCHES MAXIMUM BOTH ENDS IN |
| Cross-Sectional Shape Style | SEMI-CIRCLE |
| Outside Diameter | 10.125 INCHES MAXIMUM BOTH ENDS IN |
| Inside Diameter | 10.00 INCHES MINIMUM BOTH ENDS IN |
| Outside Width | 1.00 INCHES MINIMUM AND 1.50 INCHES MAXIMUM BOTH ENDS IN |
| Material | PLASTIC ARAMID ALL PLIES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| M32107/3-1L45 MIDNT BL | 2/2 Government specification standardization U.S. Government activity |
| M32107/3 | 5/9 Secondary reference U.S. Government activity |
| M32107/3-1L45 MIDNT BL | 5/9 Secondary reference U.S. Government activity |
| MIL-PRF-32107/3 | 4/1 Identification reference U.S. Government activity |
| M32107/3-1L45 MIDNT BL | 5/9 Secondary reference Ke Fibertec North America Inc |
NSN 4720-01-644-7073 is a Hose,air Duct, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 4720-01-650-4286, 4720-01-650-4488, 4720-01-650-4491. Verify interchangeability with system specifications before substitution.
Key specifications for 4720-01-644-7073: Inside Width: 0.750 INCHES MINIMUM AND 1.000 INCHES MAXIMUM BOTH ENDS IN; Cross-Sectional Shape Style: SEMI-CIRCLE; Outside Diameter: 10.125 INCHES MAXIMUM BOTH ENDS IN; Inside Diameter: 10.00 INCHES MINIMUM BOTH ENDS IN. 6 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.