I use a jean needle for machine quilting with thread 50 wt or thicker thread. No matter what the thread size says to match needle to it. The jeans needle always work for me when the others give me problems of shredded thread to breaking thread. Seldom have problems with any type of cotton or poly thread. I have heard thread popping in a finished quilt when my grands were tugging it. I think some quilts will be tugged or snagged if used so no use fretting over it. I've never had one fall apart yet.