Tool Adaptor Rods by SRECO-FLEXIBLE® are 8 in. long with nuts that are used to fasten a cleaning tool to a string of rods. One nut has fine, left-hand threads and the other has coarse, right-hand threads.
Blu-Steel® Coupling Nuts by SRECO-FLEXIBLE® consist of left-hand, fine thread and right-hand, coarse thread coupling nuts. The threads on these nuts are cold-rolled for easier assembly and disassembly.