The Locknut,tube Fitting, cataloged under National Stock Number 4730-01-330-9415, 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15 specifications, cited from the U.S. Government catalog. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-330-9415 |
| Item Name | Locknut,tube Fitting |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 1.875 INCHES NOMINAL IN |
| Packing Recess Diameter | 1.875 INCHES NOMINAL IN |
| Thread Series | UN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.625 INCHES IN |
| Specification/standard Data | 81343-J514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51860 GOVERNMENT STANDARD |
| Nondefinitive Spec/std Data | 25B FIGURE |
| Nut Height | 0.410 INCHES NOMINAL IN |
| Nut Style | TUBE FITTING LOCKNUT |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Fabrication Method | MACHINED |
| Nominal Tube Outside Diameter | 1.250 INCHES IN |
| Packing Recess Depth | 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 |
| Reference | Meaning |
|---|---|
| MS51860-11NC | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 20 080118S | 5/9 Secondary reference U.S. Government activity |
| 20WLN-SS | 5/1 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division |
| 20 080118S | 5/1 Secondary reference Sae International Dba Sae International |
| MS51860-11S | 2/2 Government specification standardization U.S. Government activity |
| 20WLN-SS | 5/9 Secondary reference U.S. Government activity |
| MIL-F-18866 | 5/9 Secondary reference U.S. Government activity |
| MS51860-11SS | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-18866 | 4/1 Identification reference U.S. Government activity |
| J514 | 5/9 Secondary reference U.S. Government activity |
| 20 070118S | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-330-9415 is a Locknut,tube Fitting, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5310-01-558-4118. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-330-9415: Width Across Flats: 1.875 INCHES NOMINAL IN; Packing Recess Diameter: 1.875 INCHES NOMINAL IN; Thread Series: UN; Thread Direction: RIGHT-HAND. 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.