The Locknut,tube Fitting, cataloged under National Stock Number 4730-01-449-9669, 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14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-449-9669 |
| Item Name | Locknut,tube Fitting |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 0.410 INCHES NOMINAL IN |
| Hole Thread Quantity Per Inch | 12 |
| Thread Series | UN |
| Hole Configuration Style | CONFIGURATION C |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.0625 INCHES IN |
| Specification/standard Data | MS51860A GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | II STYLE AND 3/4IN OD TUBE SIZE IN |
| Nut Height | 1.375 INCHES NOMINAL IN |
| Surface Treatment | ZINC NUT |
| Hole Nominal Thread Diameter | 1.067 INCHES IN |
| Material | STEEL AND STEEL CORROSION RESISTING NUT |
| Nominal Tube Outside Diameter | 0.750 INCHES IN |
| Hole Type and Quantity | 1 TAPPED |
| 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 |
|---|---|
| MS51860-58Z | 2/2 Government specification standardization U.S. Government activity |
| MIL-DTL-18866 | 4/1 Identification reference U.S. Government activity |
NSN 4730-01-449-9669 is a Locknut,tube Fitting, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-449-9669: Width Across Flats: 0.410 INCHES NOMINAL IN; Hole Thread Quantity Per Inch: 12; Thread Series: UN; Hole Configuration Style: CONFIGURATION C. 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.