3 Pack, Replacement Drain Caps, 5/16-24 and 3/8- 24 and 3/8 -27 Thread, Fits Most Drainable Valves and Stop Valves With Drain. Large and small sizeFits most domestic and import stop, waste valves, drainable ball and gate valves5/16"-24 and 3/8"- 24 and 3/8" -27 Thread