The Union,pipe to Tube, cataloged under National Stock Number 4730-01-138-6697, 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 Triumph Manufacturing Company, Inc.. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-138-6697 |
| Primary Part Number | 2621-021-01ASSY88 |
| Item Name | Union,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Triumph Manufacturing Company, Inc. |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 PREFORMED PACKING |
| Nominal Pipe Size Accommodated | 0.750 INCHES SECOND END IN |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Coupling Flange Shape | ROUND |
| Nominal Overall Length | 5.250 INCHES IN |
| Connection Type | UNTHREADED EXTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST 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 |
| Thread Class | 2A FIRST END A |
| Thread Quantity Per Inch | 12 FIRST END |
| Material | STEEL CORROSION RESISTING 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 |
| Part Number | Manufacturer |
|---|---|
| 2621-021-01ASSY88 | Triumph Manufacturing Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2621-021-01ASSY88 | 3/2 Design control — primary reference U.S. Government activity |
| 2621-021-01 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-138-6697 is a Union,pipe to Tube, manufactured by Triumph Manufacturing Company, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-138-6697 has 1 manufacturer part number on file: 2621-021-01ASSY88 (Triumph Manufacturing Company, Inc.).
Key specifications for 2621-021-01ASSY88: Furnished Items and Quantity: 2 PREFORMED PACKING; Nominal Pipe Size Accommodated: 0.750 INCHES SECOND END IN; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END; Connection Style: PLAIN (PIPE) SECOND END. 17 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.