The Union,tube, cataloged under National Stock Number 4730-01-325-7512, 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 15 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-325-7512 |
| Item Name | Union,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 TAILPIECE AND 1 UNION |
| Nominal Pipe Size Accommodated | 0.250 INCHES FIRST END IN |
| Nominal Pipe Size Accommodated | 0.250 INCHES SECOND END IN |
| Connection Style | SOCKET (PIPE) FIRST END |
| Connection Style | SOCKET (PIPE) SECOND END |
| Nominal Overall Length | 1.210 INCHES IN |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | UNTHREADED INTERNAL PIPE SECOND END |
| Material Document and Classification | MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Type | TONGUE |
| Pipe Wall Thickness Designation for Which Designed | SCHEDULE STD FIRST END |
| Pipe Wall Thickness Designation for Which Designed | SCHEDULE STD SECOND END |
| Media for Which Designed | WATER SINGLE RESPONSE |
| Material | NICKEL ALLOY OVERALL |
| 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 |
|---|---|
| 2621-791-03 | D/9 Drawing number reference only U.S. Government activity |
| 508-4685766 | D/9 Drawing number reference only U.S. Government activity |
| 2621-791-03 ASSY 106 | 3/2 Design control — primary reference U.S. Government activity |
| 262179103-0106 | 5/2 Secondary reference U.S. Government activity |
| 508-4685766 ITEM F55 | 5/2 Secondary reference U.S. Government activity |
| 4685766 ITEM F55 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-325-7512 is a Union,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-327-0087. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-325-7512: Furnished Items and Quantity: 1 TAILPIECE AND 1 UNION; Nominal Pipe Size Accommodated: 0.250 INCHES FIRST END IN; Nominal Pipe Size Accommodated: 0.250 INCHES SECOND END IN; Connection Style: SOCKET (PIPE) FIRST END. 15 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.