The Tailpiece,union, cataloged under National Stock Number 4730-01-039-1987, 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 9 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-039-1987 |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Nominal Pipe Size Designation | 0.500 INCHES IN |
| Flange Thickness | 0.235 INCHES NOMINAL IN |
| End Connection Type | BRAZED |
| Criticality Code Justification | ZZZY |
| Seat Type | STRAIGHT FACE |
| Material | COPPER ALLOY 922 |
| Flange Outside Diameter | 1.499 INCHES NOMINAL IN |
| Working Pressure and Service Type | 1500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL GAS AND 1500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL WATER AND 1500.0 POUNDS PER SQUARE INCH (PSI) NOMINAL OIL LBS |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS,DIFFERENTIATED BY NOMINAL PIPE SIZE DESIGNATION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| 810-1385946 PIECE 3 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 810-1385946 PIECE 3L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 4730-01-039-1987 is a Tailpiece,union, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-039-1987: Nominal Pipe Size Designation: 0.500 INCHES IN; Flange Thickness: 0.235 INCHES NOMINAL IN; End Connection Type: BRAZED; Criticality Code Justification: ZZZY. 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.