S&W threaded tube ends are the easiest and most cost-effective way to attach mounts and glides to the tubes and pipes commonly used to construct frames, conveyor bases and industrial machinery. Simply hammer the threaded tube end into the bottom of the tube and attach the mount. The glass-reinforced nylon body is molded around the threaded brass insert ensuring that the insert stays put in even the toughest conditions. Manufactured in thread sizes from 38-16 to 34-10 and M10 to M20, S&Ws tube adapters will work with our entire line of PolyMount? Level-It? Anti-Vibe? and Glide-Rite?levelers, mounts and glides.