The Adapter Bushing, cataloged under National Stock Number 4730-01-604-7769, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-604-7769 |
| Item Name | Adapter Bushing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 2.50 INCHES NOMINAL IN |
| Male End Thread Size | 2.25-4.5UNC |
| Female End Thread Length | 2.22 INCHES MINIMUM AND 2.28 INCHES MAXIMUM IN |
| Female End Thread Class | 2B |
| Male End Thread Direction | LEFT-HAND |
| Female End Thread Size | 1.5-6UNC |
| Wrenching Facility Shape | HEXAGON |
| Male End Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Surface Treatment | PASSIVATE |
| Female End Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Male End Thread Class | 2A A |
| Female End Thread Direction | LEFT-HAND |
| Material | STEEL CORROSION RESISTING |
| Male End Thread Length | 1.75 INCHES NOMINAL IN |
| Thickness | 0.24 INCHES MINIMUM AND 0.26 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 3909AS1517-2 | 3/9 Design control — primary reference L3harris Technologies, Inc. Dba Harris Div Mine Defense Systems |
| 3909AS1517 | D/9 Drawing number reference only Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 4730-01-604-7769 is a Adapter Bushing, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-605-1781. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-604-7769: Width Across Flats: 2.50 INCHES NOMINAL IN; Male End Thread Size: 2.25-4.5UNC; Female End Thread Length: 2.22 INCHES MINIMUM AND 2.28 INCHES MAXIMUM IN; Female End Thread Class: 2B. 15 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.