25T (Futaba) Set Screw Shaft Coupler

I use this shaft coupler to connect my Futaba servo to the open/close rod on my window blinds. The coupler is slotted on one side to match the slots on the Futaba's shaft. The other is smooth, but contains a small set screw that locks in place on the rod using a hex key. I own several of these to control the opening and closing of almost a dozen window blinds in my home and have never experienced a failure due to the coupler slipping or cracking under pressure.

Nice

Perfect for straight-line shaft applications, holds firmly