Achilles Inflatable Replacement Air Valve, GrayAchilles replacement PH screw-in air valve.Achilles Part #C342GY.Simply threads in – no tool necessary.Fits all of Achilles recreational boats. See related products below for riverboat and commercial (SU Series) type valve.Comes complete with C349GY valve cap, C344 O ring, C3421 valve flapper and C343N valve strap. See related products below for extras.See related products below for Achilles valve adapter.6 threads.Also fits Dynous and Nissan Inflatables.Outer diameter of threaded part is 1 5/16″.