Lift & Turn Bathtub Drain, Oil Rubbed Bronze Finish - Plumb USA Most tub drains are either 1 7/8" coarse threaded or 1 5/8" fine threaded. This one will fit 1 7/8" coarse threaded and 1 5/8" fine thread. (white adaptor) Brass construction Oil rubbed bronze finish Lift and turn drain plugs