The Tailpiece,union, cataloged under National Stock Number 4730-01-075-5107, 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 9 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-075-5107 |
| Primary Part Number | A6TL59-3-12 316SS |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Bec Systems Llc Dba Bec Machine Products |
| Status | ACTIVE |
| Union Outside Diameter | 1.625 INCHES NOMINAL IN |
| End Connection Type | THREADED |
| Seat Type | RECESSED FACE |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1.062-12 |
| Screw Thread Series Designator | UN |
| Screw Thread Location | EXTERNAL |
| Material | STEEL COMP 316 |
| Working Pressure and Service Type | 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL WATER AND 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL OIL AND 6000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL GAS LBS |
| 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 |
|---|---|
| A6TL59-3-12 316SS | Bec Systems Llc Dba Bec Machine Products (USA) |
| Reference | Meaning |
|---|---|
| 6343B | C/1 Advisory reference — outside the item-of-supply concept Siemens Energy, Inc. Dba Dresser-Rand |
| 200114L | 5/9 Secondary reference U.S. Government activity |
| 6343B | 5/9 Secondary reference U.S. Government activity |
| 200113AE | D/9 Drawing number reference only U.S. Government activity |
| 200113AE PC 437 | 3/9 Design control — primary reference U.S. Government activity |
| 6343B | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 200113AE PC 437 | C/1 Advisory reference — outside the item-of-supply concept Siemens Energy, Inc. Dba Dresser-Rand |
| 59R-3-316SS | 5/2 Secondary reference U.S. Government activity |
| 200114L PC437 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-075-5107 is a Tailpiece,union, manufactured by Bec Systems Llc Dba Bec Machine Products, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-075-5107 has 1 manufacturer part number on file: A6TL59-3-12 316SS (Bec Systems Llc Dba Bec Machine Products).
Key specifications for A6TL59-3-12 316SS: Union Outside Diameter: 1.625 INCHES NOMINAL IN; End Connection Type: THREADED; Overall Length: 2.062 INCHES NOMINAL IN; Seat Type: RECESSED FACE. 9 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.