Only Cub Cadets - 42" snow plow skid shoe thread

I have a 42" manual-tilt plow that fits right up to my WF cub cadets. It has an old IH sticker on it but I can't find a nameplate or any other identification on it anywhere. From pictures it looks to me just like an OEM plow that came with the 1x9-era tractors although I know this plow did not come with this particular tractor. My plow is rusty but otherwise in good shape, but it's missing the skid shoes which I definitely need. Does anyone know what thread pitch and diameter the threaded portion would be?

Edit: Found it in a parts manual (I think). Looking in the CPE-2A Blades Parts from the technical reference pages it looks like I want IH PN 466 906 R11. Also looks like it specifies 1/2" threads, I'm assuming UNC (1/2-13). Does that sound right, can anyone confirm? Before someone says just try a 1/2" bolt, The threads are all busted up so I'll have to re-tap for whatever eventually goes in there.