The ServoCity Set-Screw Shaft Coupler (3/8" Round Bore to 3/8" Round Bore) facilitates the connection of two shafts with a 3/8-inch diameter. It features M5 set-screws on each end to ensure secure attachment, making it ideal for applications with limited space. The coupler includes built-in shims at each end, allowing it to operate adjacent to a bearing without making contact with the outer race.