The Nut,tube Coupling, cataloged under National Stock Number 4730-01-593-6839, 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 Boeing Defence Australia Ltd. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-593-6839 |
| Primary Part Number | BACN10YA4 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Boeing Defence Australia Ltd |
| Status | ACTIVE |
| Width Across Flats | 0.562 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS 2488 ASSN STD SINGLE TREATMENT RESPONSE OR AMS 2486 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR MIL-T-9047, CONDITION A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.437 INCHES IN |
| Nut Height | 0.720 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OR PHOSPHATE OVERALL |
| Nut Style | TUBE COUPLING |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Smallest Inside Diameter | 0.300 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 0.250 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 |
|---|---|
| BACN10YA4 | Boeing Defence Australia Ltd (AUS) |
| Reference | Meaning |
|---|---|
| BACN10YA4N | 5/2 Secondary reference U.S. Government activity |
| BACN10YA4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-593-6839 is a Nut,tube Coupling, manufactured by Boeing Defence Australia Ltd, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-593-6839 has 1 manufacturer part number on file: BACN10YA4 (Boeing Defence Australia Ltd).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-661-9615. Verify interchangeability with system specifications before substitution.
Key specifications for BACN10YA4: Width Across Flats: 0.562 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS 2488 ASSN STD SINGLE TREATMENT RESPONSE OR AMS 2486 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Material Document and Classification: AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR MIL-T-9047, CONDITION A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.