Attributes . Concretetight; Fast installation - slip bolt-on coupling over threaded end of one conduit section, butt the end of the second threaded conduit section to the first, slip bolt-on coupling to the center of the two conduit threads and tighten bolts; Provides a fast inexpensive method of joining two sections of threaded rigid conduit in areas of close conduit spacing, tight clearance locations and irregular conduit bends which may normally require an expensive union . Names