The Hose,air Duct, cataloged under National Stock Number 4720-01-650-8840, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Arrowhead Products Corp. Government technical data includes 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-650-8840 |
| Primary Part Number | NAS520-4-46 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Arrowhead Products Corp |
| Status | ACTIVE |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 0.530 INCHES MINIMUM AND 0.596 INCHES MAXIMUM BOTH ENDS IN |
| Inside Diameter | 0.500 INCHES NOMINAL BOTH ENDS 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 |
|---|---|
| NAS520-4-46 PRIMARY | Arrowhead Products Corp (USA) |
| NAS520-4-46 PRIMARY | Bemco, Inc (USA) |
| Reference | Meaning |
|---|---|
| NAS520 | D/9 Drawing number reference only U.S. Government activity |
| NAS522 | 3/1 Design control — primary reference U.S. Government activity |
| NAS520-4-46 | 3/2 Design control — primary reference U.S. Government activity |
| NAS520-4-46 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4720-01-650-8840 is a Hose,air Duct, manufactured by Arrowhead Products Corp, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-650-8840 has 2 manufacturer part numbers on file: NAS520-4-46 (Arrowhead Products Corp), NAS520-4-46 (Bemco, Inc).
Key specifications for NAS520-4-46: Cross-Sectional Shape Style: ROUND; Outside Diameter: 0.530 INCHES MINIMUM AND 0.596 INCHES MAXIMUM BOTH ENDS IN; Inside Diameter: 0.500 INCHES NOMINAL BOTH ENDS IN; Special Features: MATERIAL: RUBBER FLUOROSILICONE CLASS FQ OVERALL;CROSS-SECTIONAL LENGTH: 11.500 IN. NOM. IN. 3 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.