The Union,tube, cataloged under National Stock Number 4730-01-620-8343, 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 3 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-620-8343 |
| Primary Part Number | 801-6405504 ASSY-NN |
| Item Name | Union,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED INTERNAL TUBE SECOND END |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| 801-6405504 ASSY-NN PRIMARY | Naval Sea Systems Command (USA) |
| 594-7284978-F202 | Naval Sea Systems Command (USA) |
| DF330769 ASSY-NN | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 211034953 | 5/2 Secondary reference U.S. Government activity |
| H521-1905-F202 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-620-8343 is a Union,tube, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-620-8343 has 3 manufacturer part numbers on file: 801-6405504 ASSY-NN (Naval Sea Systems Command), 594-7284978-F202 (Naval Sea Systems Command), DF330769 ASSY-NN (Huntington Ingalls Inc Div Newport News Shipbuilding).
Key specifications for 801-6405504 ASSY-NN: Connection Type: UNTHREADED INTERNAL PIPE FIRST END; Connection Type: THREADED INTERNAL TUBE SECOND END; Part Name Assigned by Controlling Agency: TAILPIECE; Material: STEEL CORROSION RESISTING OVERALL. 3 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.