The Tailpiece,union, cataloged under National Stock Number 4730-01-055-4391, 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 Eaton Aerospace Llc. Government technical data includes 6 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-055-4391 |
| Primary Part Number | 58578-16 |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Eaton Aerospace Llc |
| Status | ACTIVE |
| Union Outside Diameter | 1.315 INCHES NOMINAL IN |
| Nominal Pipe Size Designation | 1.000 INCHES IN |
| End Connection Type | WELDED |
| Seat Type | GASKET |
| Material | STEEL COMP 304 |
| Working Pressure and Service Type | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM AIR 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 |
|---|---|
| 58578-16 PRIMARY | Eaton Aerospace Llc (USA) |
| Reference | Meaning |
|---|---|
| CV-58578-16 | 5/9 Secondary reference Eaton Aerospace Llc |
| C-58578-16 | 3/9 Design control — primary reference Eaton Corporation Dba Eaton Inoac Div Eaton |
| 190000 | D/9 Drawing number reference only Eaton Corporation Dba Eaton Inoac Div Eaton |
| C-58578-16 | 5/9 Secondary reference Eaton Aerospace Llc |
NSN 4730-01-055-4391 is a Tailpiece,union, manufactured by Eaton Aerospace Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-055-4391 has 1 manufacturer part number on file: 58578-16 (Eaton Aerospace Llc).
Key specifications for 58578-16: Union Outside Diameter: 1.315 INCHES NOMINAL IN; Nominal Pipe Size Designation: 1.000 INCHES IN; End Connection Type: WELDED; Overall Length: 1.562 INCHES NOMINAL IN. 6 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.