Malleable Iron Pipe Fitting, 1-1/2 Inch Cap

For a 1-1/2 inch pipe thread, this cap is sized to match that nominal 1-1/2 opening and it uses American Briggs Standard pipe threads, so it is meant to screw onto a 1-1/2 threaded male pipe end.

Standard black iron pipe is exactly what these are made for. The threads follow American Briggs Standard, which is the same thread spec used across common malleable iron pipe fittings. As long as your pipe is cut and threaded properly, assembly should go smoothly. The opening is also chamfered, so getting the threads started is easier than with fittings that skip that detail.