The Union,pipe, cataloged under National Stock Number 4730-01-197-7128, 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 Bec Systems Llc Dba Bec Machine Products. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-197-7128 |
| Primary Part Number | 2621-791-03 ASSY 120 |
| Item Name | Union,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Bec Systems Llc Dba Bec Machine Products |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 PREFORMED PACKING |
| Nominal Pipe Size Accommodated | 1.000 INCHES ALL ENDS IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Coupling Flange Shape | ROUND |
| Nominal Overall Length | 3.750 INCHES IN |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | UNTHREADED |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | MIL-C-15726,70,30 MIL SPEC SINGLE MATERIAL RESPONSE TAILPIECE |
| Material Document and Classification | MIL-C-15726,70,30 MIL SPEC SINGLE MATERIAL RESPONSE THREAD PIECE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Type | RECESSED |
| Pipe Wall Thickness Designation for Which Designed | SCHEDULE 40 ALL ENDS |
| Material | NICKEL ALLOY NUT |
| Material | COPPER ALLOY TAILPIECE |
| Material | COPPER ALLOY THREAD PIECE |
| 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 |
|---|---|
| 2621-791-03 ASSY 120 | Bec Systems Llc Dba Bec Machine Products (USA) |
| 208-4645305 ITEM F14 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 208-4645305 | D/9 Drawing number reference only Naval Sea Systems Command |
| 513-4682935 ITE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2621-791-03 | D/9 Drawing number reference only U.S. Government activity |
| 2621-791-03 ASSY 120- | 5/2 Secondary reference U.S. Government activity |
| 15-97-5378 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-197-7128 is a Union,pipe, manufactured by Bec Systems Llc Dba Bec Machine Products, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-197-7128 has 2 manufacturer part numbers on file: 2621-791-03 ASSY 120 (Bec Systems Llc Dba Bec Machine Products), 208-4645305 ITEM F14 (Naval Sea Systems Command).
Key specifications for 2621-791-03 ASSY 120: Furnished Items and Quantity: 1 PREFORMED PACKING; Nominal Pipe Size Accommodated: 1.000 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS; Coupling Flange Shape: ROUND. 16 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.