New to the hvac world: The Rollout Nut. This new invention was stumbled upon quite by accident just like many other great inventions. In the manufacturing process of the lowly wire nut the metal wire gripper was accidentally omitted and in the heat testing phase the conductors became loose and lost their connection. Seizing upon this new found characteristic the brilliant inventor found his claim to fame. And now with new advancements in plastics they are now available in a myriad of temperatures all color coded for your convenience.