Multi-Function Clip | Acoustical, Ceiling and Partitioning, Datacom and Low Voltage, Electrical, Fire Sprinkler, Hvac, Plumbing and Refrigeration | Hex-Key Ends Are Square-Cut for a Secure Full-Depth Fit and Maximum Contact With the Hex Socket to Prevent Slippage and Stripping of the Socket | Used to Join Two Externally Threaded Parts of Equal Thread Diameter and Pitch, Often Two Pieces of Threaded RodFurbay Electric Supp