The Thread Piece,union, cataloged under National Stock Number 4730-01-181-3957, 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 Hydrasearch Company, Llc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-181-3957 |
| Primary Part Number | 6T593-12NICU |
| Item Name | Thread Piece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hydrasearch Company, Llc |
| Status | ACTIVE |
| Union End Thread Direction | RIGHT-HAND |
| End Connection Type | THREADED |
| Union End Thread Size | 1-3/4-12 |
| Seat Type | STRAIGHT FACE |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1-1/16-12 |
| Screw Thread Series Designator | UN |
| Union End Screw Thread Series Designator | UN |
| Screw Thread Location | EXTERNAL |
| 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 |
|---|---|
| B102235-2 | Lockheed Martin Sippican, Inc. Div Communication Division (USA) |
| RE-B102235-2 | Lockheed Martin Sippican, Inc. Div Communication Division (USA) |
| RE-B102235-2 | Naval Sea Systems Command (USA) |
| 6T593-12NICU PRIMARY | Hydrasearch Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 59T-3-M | 3/2 Design control — primary reference U.S. Government activity |
| 59T-3-M0NEL | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| RE-B102235 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-181-3957 is a Thread Piece,union, manufactured by Hydrasearch Company, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-181-3957 has 4 manufacturer part numbers on file: B102235-2 (Lockheed Martin Sippican, Inc. Div Communication Division), RE-B102235-2 (Lockheed Martin Sippican, Inc. Div Communication Division), RE-B102235-2 (Naval Sea Systems Command), 6T593-12NICU (Hydrasearch Company, Llc).
Key specifications for 6T593-12NICU: Union End Thread Direction: RIGHT-HAND; End Connection Type: THREADED; Union End Thread Size: 1-3/4-12; Overall Length: 1.938 INCHES NOMINAL IN. 10 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.