Universal steering couplers

Johnny Mac said

Mic the shafts to double check me, but pretty sure this is what I used.

New 3/4"-36 Spline x 3/4" Round Black Steering Shaft U Joint Powder Coated | eBay

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I did a similar one, but it was a double d on one end. I ground down my shaft to fit. I liked the idea of the double d shaft, no way it can rotate inside the coupler and is removable.