1) Thread holding bush over tight|2) While clamping the part in the bush part chips struck in between the threads.|3) operator did not cleaned the bush ID completely and loaded the part and continued the production because of which the thread got damaged during the clamping of part.|4) operator did not noticed the clogging of chips inside the thread.|5) operator without informing the supervisor loaded the second part on the damaged fixture and resulted in the rejection of the second part.