The Nut,tube Coupling, cataloged under National Stock Number 4730-00-541-3229, 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 Rolls-Royce Corporation. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-00-541-3229 |
| Primary Part Number | 6743301-6 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| Length to Shoulder | 0.656 INCHES NOMINAL IN |
| Width Across Flats | 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN |
| Thread Series | UNF |
| Material Document and Classification | AMS 5645 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.562 INCHES IN |
| Nut Height | 0.719 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 321 OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 0.440 INCHES MINIMUM AND 0.443 INCHES MAXIMUM IN |
| Nominal Tube Outside Diameter | 0.440 INCHES 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 |
|---|---|
| 6743301-6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 6743301-6 PRIMARY | Rolls-Royce Corporation (USA) |
| Reference | Meaning |
|---|---|
| 6743301-6 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| 6743301-6 | 5/9 Secondary reference General Motors Corp |
NSN 4730-00-541-3229 is a Nut,tube Coupling, manufactured by Rolls-Royce Corporation, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-541-3229 has 2 manufacturer part numbers on file: 6743301-6 (Sps Technologies, Llc Dba PB Fasteners), 6743301-6 (Rolls-Royce Corporation).
Key specifications for 6743301-6: Length to Shoulder: 0.656 INCHES NOMINAL IN; Width Across Flats: 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN; Thread Series: UNF; Material Document and Classification: AMS 5645 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.