I've been trying my search-fu, and so far all I've been able to figure out is that the drilled holes are 1/8" in diameter. However, I do not know how long the pins are supposed to be.

Side information: I have to Ballroom racks, and after moving, decided to stack them. However, I do not have the pins due to a lack of foresight.

If anyone here would be so kind as to help square me away, I would greatly appreciate it.