Male to female pipe bushings are made to adapt female pipe thread to a smaller size female pipe thread. They feature external male threads for threading into internally threaded parts and smaller female internal thread so that male mating parts can be threaded into tit. They come in a range of different size combinations depending on the applications. They are made for use with air, natural gas, oil, and water and are made of schedule 40 black iron which has a 150LB rating and is made for non-corrosive environments.