Hanger Bolt Plain Center have threaded areas at both ends with a plain center between threads. Wood screw thread at one end and unified thread at the other. Designed for insertion into a predrilled pilot hole. The end of the wood thread is designed as a taper which is threaded all the way to its blunt tip. Designed to hang material from wooden structures. The lag is wrenched into the wood and the assembly is completed after applying a nut. Commonly used for suspending electrical wiring and sheet metal, as well as in the furniture industry.