Well, I'm going to change to a 16/42 combination and have heard all the horror stories about this little bolt head being stripped etc. and a personal observation brought some new light to me. I made the startling discovery that not all 6mm hex wrenchs are exactly the same...or it could be that not all speed sensor bolt heads are perfectly milled/cast however they make the thing. However, it doesn't matter which one is correct, it DOES matter however, that the wrench in question fits YOUR particular bolt head. As you can see from the pictures, I had an assortment of 6mm hex's on hand and only ONE of them made a nice tight fit in the bolt. You can read the captions for what happened next... and yes, the bolt came out without stripping the head.
If you don't have an assortment of 6mm from which to choose the best fit... I'm sure I'll get some flak from this but I might try some RED loctite on the end of your hex, push it in and let it sit overnight to make a tighter fit in the bolt head. If the bolt strips, then it was gonna strip anyway with that hex. If it comes out, then just heat it to 400 deg and get the hex out of the head... This last part is just theory so if anyone tires this, let me know!
If you don't have an assortment of 6mm from which to choose the best fit... I'm sure I'll get some flak from this but I might try some RED loctite on the end of your hex, push it in and let it sit overnight to make a tighter fit in the bolt head. If the bolt strips, then it was gonna strip anyway with that hex. If it comes out, then just heat it to 400 deg and get the hex out of the head... This last part is just theory so if anyone tires this, let me know!