Mighty-Move® Expansion Coupling 1-1/2″, Steel, For EMT
https://nsiindustries.com/product/mighty-move-expansion-coupling-1-1-2-steel-for-emt/
The Bridgeport 1-1/2″ Steel Expansion Coupling is used to compensate for 2″ of lateral movement in either direction for EMT conduit in dry locations. The expansion coupling assembles like a regular EMT set screw coupling.