Generally known as a set screw, these headless sorts of screws have quite a few makes use of. This specific style has a hex socket generate, as well as a square profiled end referred to as a Pet level on the alternative stop, concerning ISO 4028 or DIN 915. A2 https://damienjzgpb.dbblog.net/3861314/not-known-details-about-masonry-screws