2013~2016 Clunk after changing rear rotors and pads

[speedy8727]

On my 2013, I replaced my rear rotors and pads last month and after a couple of weeks, I can hear a single clunk when engaging the brakes at low speed (around 40km/h).
I lubed everything (slide pins, mounting hardware, etc.) and (re)torqued everything according to the owners manual. I think the break pads "knocks" against the caliper bracket (there seems to be a small gap).
I installed BOSCH BC1624 QuietCast; Ceramic. Did I remove too much rust on the caliper bracket before installing the hardware clips? Maybe the bosch mounting hardware are thinner than other brands? Someone experienced the problem? Solutions?

 

[speedy8727]

(I also tripple checked the torque on the lug nuts)

 

[RL911]

I think if the brake pads are too loose in the brackets you’ll get this sound. Did you compare the pads to the ones you removed?