These Countersunk Plugs are used to close the ends of internally threaded pipes and fittings.
Hex Bushings
Hex Bushings
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.