The Union,pipe to Tube, cataloged under National Stock Number 4730-01-138-6699, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-138-6699 |
| Item Name | Union,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 PREFORMED PACKING |
| Nominal Pipe Size Accommodated | 1.000 INCHES SECOND END IN |
| Connection Style | SOCKET (PIPE) SECOND END |
| Connection Style | PLAIN (TUBE) FIRST END |
| Coupling Flange Shape | ROUND |
| Nominal Overall Length | 4.575 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | UNTHREADED INTERNAL PIPE SECOND END |
| Style Designator | SCREWED |
| Nominal Outside Diameter Tube Accommodated | 1.250 INCHES FIRST END IN |
| Seat Type | RECESSED |
| Nominal Thread Size | 1.625 INCHES FIRST END IN |
| Pipe Wall Thickness Designation for Which Designed | SCHEDULE STD SECOND END |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A FIRST END A |
| Thread Quantity Per Inch | 12 FIRST END |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UN FIRST END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 2621-021-01ASSY64 | 3/2 Design control — primary reference U.S. Government activity |
| 2621-021-01 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-138-6699 is a Union,pipe to Tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-138-6699: Furnished Items and Quantity: 2 PREFORMED PACKING; Nominal Pipe Size Accommodated: 1.000 INCHES SECOND END IN; Connection Style: SOCKET (PIPE) SECOND END; Connection Style: PLAIN (TUBE) FIRST END. 18 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.