Threaded Hex Head Bushings Feature a larger male thread on the outside and a smaller female thread on the inside. They allow a smaller pipe to fit into a larger opening, having a hexagonal head for tightening with a wrench. It is a specialized fitting used to connect pipes or valves of two different thread sizes or diameters. They are made as per ASME B16.11 : Forged Fittings, Socket Welding and Threaded, available size range is 1/8″ to 4″. This page provides metric dimensions for this fitting.
Available Dimensions are: A: Length (Minimum), G | Hex Head (Minimum), F : Width of Flats (Nominal).
| NPS | A | F | G |
|---|---|---|---|
| 1/8 | 10 | 11 | NA |
| 1/4 | 11 | 16 | 3 |
| 3/8 | 13 | 18 | 4 |
| 1/2 | 14 | 22 | 5 |
| 3/4 | 16 | 27 | 6 |
| 1 | 19 | 36 | 6 |
| 1-1/4 | 21 | 46 | 7 |
| 1-1/2 | 21 | 50 | 8 |
| 2 | 22 | 65 | 9 |
| 2-1/2 | 27 | 75 | 10 |
| 3 | 28 | 90 | 10 |
| 4 | 32 | 115 | 13 |
| NPS | A | F | G |
General Notes
Dimensions are in millimeters.
