Quote Originally Posted by Shed tuner View Post
obviously the OD needs to match the thread the die is trying to cut. From memory it's around 8mm, so if you choose m8 (or whatever matches) you are good. Then thread on your alli head.

The aussie uses a bolt IIRC... if you change that for a female countersunk version (aka a nut), you are fine again. Just thread the nut onto a threaded bolt, backup up against another nut so it's tight. Then turn it against a grindstone to get the conical shape. Cut a slot in the face for a large screwdriver bit.
Thanks Jon