The Adapter Bushing, cataloged under National Stock Number 4730-01-161-4990, 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 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-161-4990 |
| Item Name | Adapter Bushing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Male End Thread Size | 7/16-20 |
| Wrenching Facility Diameter | 0.500 INCHES NOMINAL IN |
| Female End Thread Length | 0.726 INCHES NOMINAL IN |
| Female End Thread Class | 2B |
| Male End Thread Direction | RIGHT-HAND |
| Female End Thread Size | 1/4-20 |
| Wrenching Facility Shape | ROUND |
| Male End Screw Thread Series Designator | UNF |
| Surface Treatment | PASSIVATE |
| Female End Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Male End Thread Class | 2A A |
| Female End Thread Direction | RIGHT-HAND |
| Material | STEEL COMP 416 |
| Male End Thread Length | 0.656 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 |
| Reference | Meaning |
|---|---|
| 258522-000 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-161-4990 is a Adapter Bushing, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-161-4990: Male End Thread Size: 7/16-20; Wrenching Facility Diameter: 0.500 INCHES NOMINAL IN; Female End Thread Length: 0.726 INCHES NOMINAL IN; Female End Thread Class: 2B. 14 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.