The Locknut,tube Fitting, cataloged under National Stock Number 4730-00-678-9457, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-678-9457 |
| Primary Part Number | 12L5NS |
| Item Name | Locknut,tube Fitting |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division |
| Status | ACTIVE |
| Width Across Flats | 1.250 INCHES NOMINAL IN |
| Packing Recess Diameter | 0.183 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TY2,CL6 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UN |
| Material Document and Classification | 66,AISI 12L14 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.062 INCHES IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | TUBE FITTING LOCKNUT |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL OVERALL |
| Nominal Tube Outside Diameter | 0.750 INCHES IN |
| Packing Recess Depth | 0.166 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 |
| Part Number | Manufacturer |
|---|---|
| 12L5NS PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division (USA) |
| Reference | Meaning |
|---|---|
| 12L5NS | 5/9 Secondary reference U.S. Government activity |
| 12L5NS | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
NSN 4730-00-678-9457 is a Locknut,tube Fitting, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-678-9457 has 1 manufacturer part number on file: 12L5NS (Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division).
Key specifications for 12L5NS: Width Across Flats: 1.250 INCHES NOMINAL IN; Packing Recess Diameter: 0.183 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TY2,CL6 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UN. 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.