The Union,pipe to Tube, cataloged under National Stock Number 4730-01-620-6783, 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 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-620-6783 |
| Primary Part Number | 801-6405504 ASSY AB |
| Item Name | Union,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.500 INCHES FIRST END IN |
| Connection Style | SOCKET (TUBE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED INTERNAL TUBE SECOND END |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES SECOND END IN |
| Nominal Thread Size | 1.750 INCHES SECOND END IN |
| Thread Class | 2B SECOND END |
| Thread Quantity Per Inch | 12 SECOND END |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UN SECOND END |
| 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 AB PRIMARY | Naval Sea Systems Command (USA) |
| 551-7015420-F213 | Naval Sea Systems Command (USA) |
| DF330769 ASSY AB | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 211031130SF | 5/2 Secondary reference U.S. Government activity |
| H765-3804-F213 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-620-6783 is a Union,pipe to Tube, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-620-6783 has 3 manufacturer part numbers on file: 801-6405504 ASSY AB (Naval Sea Systems Command), 551-7015420-F213 (Naval Sea Systems Command), DF330769 ASSY AB (Huntington Ingalls Inc Div Newport News Shipbuilding).
Key specifications for 801-6405504 ASSY AB: Nominal Pipe Size Accommodated: 0.500 INCHES FIRST END IN; Connection Style: SOCKET (TUBE) FIRST END; Connection Style: PLAIN (PIPE) SECOND END; Connection Type: UNTHREADED INTERNAL PIPE FIRST END. 11 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.