The Thread Piece,union, cataloged under National Stock Number 4730-00-554-9873, 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 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-554-9873 |
| Item Name | Thread Piece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Union End Thread Direction | RIGHT-HAND |
| Material Hardness Rating | 92.0 ROCKWELL B MINIMUM AND 98.0 ROCKWELL B MAXIMUM |
| End Connection Type | THREADED |
| Union End Thread Size | 1-7/16IN-12 IN |
| Seat Type | STRAIGHT FACE |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1-1/16-12N |
| Screw Thread Series Designator | UN |
| Union End Screw Thread Series Designator | UN |
| Screw Thread Location | EXTERNAL |
| Material | STEEL COMP 4130 |
| Working Pressure and Service Type | 4000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL WATER LBS |
| 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 |
|---|---|
| A316277-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-554-9873 is a Thread Piece,union, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-554-9873: Union End Thread Direction: RIGHT-HAND; Material Hardness Rating: 92.0 ROCKWELL B MINIMUM AND 98.0 ROCKWELL B MAXIMUM; End Connection Type: THREADED; Union End Thread Size: 1-7/16IN-12 IN. 12 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.