1/4" 3/8" 1/2" 3/4" 1" 1-1/2“ BSP Male Thread 304 Stainless Steel Full Thread Nipple Pipe Fitting Connector Adapter male jointer
https://www.vogueparade.com/shopping/EN/200282142/1/1005003746502799/14-38-12-34-1-1-12-bsp-male-thread-304-stainless-steel-full-thread-nipple-pipe-fitting-connector-adapter-male-jointer//