Pipe Plug 1/8" 1/4" 3/8" 1/2" 3/4" 1" Brass Copper Pipe Fitting Hex/Octagon Coupling Coupler Female Thread Fittings Pipe Plug
https://www.vogueparade.com/shopping/EN/200282142/1/4000801691996/pipe-plug-18-14-38-12-34-1-brass-copper-pipe-fitting-hexoctagon-coupling-coupler-female-thread-fittings-pipe-plug//