helloooo, easy one i guess

i have a 3.5 in tall nut on which i would like to apply a force pulling down on the bottom half and another pulling up on the top half : a threaded rod is screwed in the bottom half (weight is hanging) and another stud is threaded in the top half the whole part is attached to something fixed.

normaly i would use a split face for conventional parts, im not too sure how to do this correctly with this case

how can i do this? 

thanks