These are all of the threads I have a knob for:
US Threads:1/2 - 131/2 - 203/8 - 163/8 - 247/16 - 207/16 - 32
Metric Threads:M8 x 1.25M10 x 1.25M10 x 1.50M12 x 1.25M12 x 1.75M16 x 1.50M16 x 1.75