This week I replaced my Abs unit with a used one. I couldn't get the stuck bleed screw off, but bought a 3/8 drive socket with a 5/16 square head that fit the bleed screw from Home Depot online. HD calls it a female pipe plug socket, part # 1002-346-753. I replaced the original bleed screw with a M8-1.25 x 24mm long from Oreillys auto, part #13902, from Dorman's Help section. Hardest part was just screwing the six brake tube lines into the modulator unit. This was on a 1995 Prelude Si, H23A1, 2.3l, DOCH engine. Lot of work, but worth the effort.