The Locknut,tube Fitting, cataloged under National Stock Number 4730-01-170-7042, 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 19 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-170-7042 |
| Item Name | Locknut,tube Fitting |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 0.813 INCHES NOMINAL IN |
| Packing Recess Diameter | 0.678 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| Thread Series | UNF |
| Hole Configuration Style | CONFIGURATION B |
| Material Document and Classification | QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL EXCEPT INSERT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.562 INCHES IN |
| Nut Height | 0.359 INCHES NOMINAL IN |
| Drilled Hole Diameter | 0.046 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL EXCEPT INSERT |
| Nut Style | TUBE FITTING LOCKNUT |
| Thread Class | 3B |
| Thread Quantity Per Inch | 18 |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE LOCKING INSERT |
| Material | ALUMINUM ALLOY 2024 OVERALL EXCEPT INSERT |
| Nominal Tube Outside Diameter | 0.375 INCHES IN |
| Packing Recess Depth | 0.104 INCHES NOMINAL IN |
| Hole Type and Quantity | 3 DRILLED |
| 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 |
|---|---|
| NAS1410DD6E | 3/2 Design control — primary reference U.S. Government activity |
| AS4841 | 5/9 Secondary reference U.S. Government activity |
| NAS1410 | 3/1 Design control — primary reference U.S. Government activity |
| AS4841 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 4730-01-170-7042 is a Locknut,tube Fitting, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-170-7042: Width Across Flats: 0.813 INCHES NOMINAL IN; Packing Recess Diameter: 0.678 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT; Thread Series: UNF. 19 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.