Getting clunk type sound when braking hard

I had a little time to kill after work and before my sons hockey practice so I jacked up my car and started searching for issues. Took off the drivers side front wheel and went to re tighten the caliper and I noticed I had put the nut on the strut rod end that passes through the lower control arm but the end was flush with the nut and had at least 3/8 of an inch of threads. Put a socket on and tightened it down till I couldn’t anymore. That would be awesome if that was my issue. I checked out everything on the passenger side and all looked good. That would be fantastic if that was my issue. Won’t get a chance to test it out till later this week or the weekend. Thanks again for pointing me further in the right direction. I love this site.