I'm trying to create basically one cylinder going into another cylinder like a bolt/nut, but have the outer cylinder be more of a tube. So the inner cylinder is short like the nut, the idea is to have the inner cylinder be able to slide freely through the outer cylinder.
I need it to move 4.75mm into the outer cylinder per 90 degrees of rotation. So I don't think the same thread pattern as a bolt/nut will work. It might be more accurately like a gun barrel pattern, but the bullet meshes with grooves of the barrel. Sorry I don't really know the terminology.
Here's a general idea of the model, except the tube is suppose to have the grooves as well.