The Thread Piece,union, cataloged under National Stock Number 4730-01-521-9003, 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 Naval Sea Systems Command. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-521-9003 |
| Primary Part Number | 6393642 FIND 015 |
| Item Name | Thread Piece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Union End Thread Direction | RIGHT-HAND |
| End Connection Type | WELDED |
| Union End Thread Size | 1.750 |
| Seat Type | GASKET |
| Tubing Outside Diameter | 1.250 INCHES NOMINAL IN |
| Union End Screw Thread Series Designator | UNF |
| 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 |
|---|---|
| 6393642 FIND 015 | Naval Sea Systems Command (USA) |
| 6393630-04 FIND 017 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H849T-20-M | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-521-9003 is a Thread Piece,union, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-521-9003 has 2 manufacturer part numbers on file: 6393642 FIND 015 (Naval Sea Systems Command), 6393630-04 FIND 017 (Naval Sea Systems Command).
Key specifications for 6393642 FIND 015: Union End Thread Direction: RIGHT-HAND; End Connection Type: WELDED; Union End Thread Size: 1.750; Overall Length: 1.438 INCHES NOMINAL IN. 7 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.