I am installing my spindles, and the hole for the bolt on the ABS sensor isnt threaded. Should it be? They are the Doestech Spindles, and neither side is threaded.

 

The screw will go in on it's own. Mine looked the same but the screw went in fine. However, the sensor has a bit of an interference problem that tends to make it twist and not line up properly. Hold the sensor out a little bit as you get the screw started and you should be fine.

Edit: It is tapping itself in though, you will have resistance as you tighten it down.