The Reducer,tube, cataloged under National Stock Number 4730-01-659-1129, 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15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-659-1129 |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Recess Nominal Depth | 1.25 INCHES SECOND END IN |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Nominal Length | 2.0 INCHES ALL ENDS IN |
| Connection Type | THREADED INTERNAL TUBE ALL ENDS |
| Style Designator | PLAIN |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Nominal Thread Size | 1.50 INCHES SECOND END IN |
| Nominal Outside Diameter | 2.0 INCHES ALL ENDS IN |
| Thread Class | 2B FIRST END |
| Thread Class | 2B SECOND END |
| Thread Quantity Per Inch | 10 FIRST END |
| Thread Quantity Per Inch | 6 SECOND END |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) FIRST END |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SECOND END |
| 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 |
|---|---|
| MA280006-36 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-659-1129 is a Reducer,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-659-1129: Recess Nominal Depth: 1.25 INCHES SECOND END IN; Connection Style: PLAIN (TUBE) ALL ENDS; Nominal Length: 2.0 INCHES ALL ENDS IN; Connection Type: THREADED INTERNAL TUBE ALL ENDS. 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.