Hanger bolts are a class apart when it comes to fasteners, for they embody both the qualities of a wood screw and a machine bolt in one. A hanger bolt typically has a threaded part at both ends, contributing to their capability of embedding into wood or any other material, leaving the end with a machine thread for attaching nuts or washers. Since they have two threads, this only means... https://www.dalloyedbolts.com/hanger-bolts-manufacturers-suppliers-stockists-exporters.html