The Nut,union, cataloged under National Stock Number 4730-01-523-6572, 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 Naval Sea Systems Command. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-523-6572 |
| Primary Part Number | 6394255 FIND 006 |
| Item Name | Nut,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 1.063 INCHES NOMINAL IN |
| Thread Series | UN |
| Temp Rating | -20.0 FAHRENHEIT MINIMUM AND 275.0 FAHRENHEIT MAXIMUM DEGF |
| Maximum Working Pressure Rating and Service for Which Designed | 6000.0 POUNDS PER SQUARE INCH (PSI) OIL LBS |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.563 INCHES IN |
| Nut Height | 0.438 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 18 |
| Material | COPPER ALLOY OVERALL |
| Smallest Inside Diameter | 0.250 INCHES NOMINAL IN |
| Shoulder Seat Diameter | 0.563 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 |
|---|---|
| 6394255 FIND 006 | Naval Sea Systems Command (USA) |
| 6394892 FIND 002 | Naval Sea Systems Command (USA) |
| 5793190-018 FIND 094 | Naval Sea Systems Command (USA) |
| 5793190-017 FIND 094 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6394892 | D/9 Drawing number reference only Naval Sea Systems Command |
| 5793190 | D/9 Drawing number reference only Naval Sea Systems Command |
| 6394255 | D/9 Drawing number reference only Naval Sea Systems Command |
| 950N-4-NAB-LW | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-523-6572 is a Nut,union, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-523-6572 has 4 manufacturer part numbers on file: 6394255 FIND 006 (Naval Sea Systems Command), 6394892 FIND 002 (Naval Sea Systems Command), 5793190-018 FIND 094 (Naval Sea Systems Command), 5793190-017 FIND 094 (Naval Sea Systems Command).
Key specifications for 6394255 FIND 006: Width Across Flats: 1.063 INCHES NOMINAL IN; Thread Series: UN; Temp Rating: -20.0 FAHRENHEIT MINIMUM AND 275.0 FAHRENHEIT MAXIMUM DEGF; Maximum Working Pressure Rating and Service for Which Designed: 6000.0 POUNDS PER SQUARE INCH (PSI) OIL LBS. 13 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.