Hex bushings are used to reduce the size of female threads from a larger to a smaller diameter. Hex Bushings are threaded fittings that have male threads on the outside and female threads on the inside with a hex head used to tighten the fitting into the threaded opening. Merchant steel fittings are designed with Dryseal Taper Threads (NPTF) for more critical applications. NPTF Dryseal threads produce a mechanical seal by the mating and slight crushing of the threads when a wrench is applied to tighten the fittings.

Reducing Hex Nipples have male threads on each end that are used to connect two other fittings or pipe of different sizes. These Reducing Hex Nipples feature a hex design in the middle to aid in the installation and disassembly of pipe lines.