The Adapter Bushing, cataloged under National Stock Number 4730-00-346-1497, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Textron Aviation Inc. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-00-346-1497 |
| Primary Part Number | 189680 |
| Item Name | Adapter Bushing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Textron Aviation Inc |
| Status | ACTIVE |
| Width Across Flats | 2.000 INCHES NOMINAL IN |
| Female End Characteristic | COUNTERSUNK |
| Counterbore/countersink Location | AT WRENCHING HEAD END |
| Male End Thread Size | 1.875 IN.-20 IN |
| Female End Thread Length | 0.625 INCHES NOMINAL IN |
| Diameter | 1.469 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Male End Thread Direction | RIGHT-HAND |
| Female End Thread Size | 1-1/4 IN. -11-1/2 IN |
| Wrenching Facility Shape | HEXAGON |
| Male End Screw Thread Series Designator | UNS |
| Surface Treatment | CADMIUM |
| Chamfer Angle in Deg | 90.000 LOCATION NOT OTHERWISE SPECIFIED |
| Depth | 0.109 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Female End Screw Thread Series Designator | NPT |
| Male End Thread Class | 2A A |
| Female End Thread Direction | RIGHT-HAND |
| Material | STEEL |
| Male End Thread Length | 0.344 INCHES NOMINAL IN |
| Thickness | 0.250 INCHES NOMINAL 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 |
|---|---|
| 189680 PRIMARY | Textron Aviation Inc (USA) |
| Reference | Meaning |
|---|---|
| 189680 | 3/9 Design control — primary reference Beechcraft Corporation Dba Textron Aviation |
NSN 4730-00-346-1497 is a Adapter Bushing, manufactured by Textron Aviation Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-346-1497 has 1 manufacturer part number on file: 189680 (Textron Aviation Inc).
Key specifications for 189680: Width Across Flats: 2.000 INCHES NOMINAL IN; Female End Characteristic: COUNTERSUNK; Counterbore/countersink Location: AT WRENCHING HEAD END; Male End Thread Size: 1.875 IN.-20 IN. 19 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.