I figure I now own these crampons, I can post this set of instructions that the seller put up for them.
Also, I did mention that the screws are M4 x 0.7 x 10mm. The lock nut is an M4 as well. The screws you buy may not be flush with the crampon (they may stick out about an mm), but they will work.
OK, I am too lazy to retype this as well.