Handle blind nut

The last part of the day is the blind nut that holds the handle onto the lever. I would much prefer to purchase this part, but the closest equivalent I have found thus far is an internal Allen drive nut from McMaster, but because they are esoteric, they are expensive. However, the machining operations requiring different setups don't have to be done sequentially, so knocking out a bunch of these would be pretty quick.

I couldn't resist putting the three parts together.