The Tailpiece,union, cataloged under National Stock Number 4730-00-142-1206, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-142-1206 |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Union Outside Diameter | 1.375 INCHES MAXIMUM IN |
| Seat Type | RECESSED FACE |
| Tubing Outside Diameter | 0.840 INCHES NOMINAL IN |
| Material | COPPER ALLOY 922 |
| Working Pressure and Service Type | 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL GAS AND 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL OXYGEN AND 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL OIL AND 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL WATER LBS |
| Reference Number Differentiating Characteristics | AQRX,AND W/PREINSERTED RINGS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 841337PC2,14 | 5/2 Secondary reference U.S. Government activity |
| 5000S4823-841337REVFPC2-14 | 5/9 Secondary reference U.S. Government activity |
| 5000S4823-841337PC2-14 | 3/1 Design control — primary reference Naval Sea Systems Command |
NSN 4730-00-142-1206 is a Tailpiece,union, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4730-00-142-1207, 4730-00-142-2906. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-142-1206: Union Outside Diameter: 1.375 INCHES MAXIMUM IN; Overall Length: 0.813 INCHES NOMINAL IN; Seat Type: RECESSED FACE; Tubing Outside Diameter: 0.840 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.