The Morrison Bros. 184S-0400 MB Stainless Steel Double Tapped Bushing, 2IN X 1IN X 1IN are used in pipe and tank fittings to reduce or adapt connections. The outside threads are male. The inside threads (threaded from the top and from the bottom) are female. The 184S Double Tapped Bushings are the same as the 184 except they are constructed of stainless steel.