Mighty-Move® Expansion Coupling 1-1/4" Steel expansion coupling for IMC and Rigid Conduit. Patented
Assembles like a regular RMC/IMC set screw coupling. To install, simply slide coupling end stop onto fixed end of RMC/IMC and tighten screw. Place movable RMC/IMC completely into coupling and mark engagement, remove RMC/IMC and mark half the distance of engagement, reinstall RMC/IMC to half distance.