The Tailpiece,union, cataloged under National Stock Number 4730-01-074-3128, 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 American Piping Accessories Co Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-074-3128 |
| Primary Part Number | A6TL59-2-08 |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | American Piping Accessories Co Inc |
| Status | ACTIVE |
| Union Outside Diameter | 1.250 INCHES NOMINAL IN |
| End Connection Type | THREADED |
| Seat Type | GASKET |
| Thread Direction | RIGHT-HAND |
| Thread Size | 3/4-16 |
| Screw Thread Series Designator | UNF |
| Screw Thread Location | EXTERNAL |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| A6TL59-2-08 | American Piping Accessories Co Inc (USA) |
| 6R592-8 | Hydrasearch Company, Llc (USA) |
| P509R-2 | Ssp Fittings Corp (USA) |
| Reference | Meaning |
|---|---|
| 59R2 | 3/2 Design control — primary reference U.S. Government activity |
| 200114L PC351 | 5/9 Secondary reference U.S. Government activity |
| 59R2 | 5/9 Secondary reference Ssp Fittings Corp |
NSN 4730-01-074-3128 is a Tailpiece,union, manufactured by American Piping Accessories Co Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-074-3128 has 3 manufacturer part numbers on file: A6TL59-2-08 (American Piping Accessories Co Inc), 6R592-8 (Hydrasearch Company, Llc), P509R-2 (Ssp Fittings Corp).
Key specifications for A6TL59-2-08: Union Outside Diameter: 1.250 INCHES NOMINAL IN; End Connection Type: THREADED; Overall Length: 1.750 INCHES NOMINAL IN; Seat Type: GASKET. 8 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.