Z-Axis threaded rod specs for ordering replacements

#1
Could someone provide or point me towards the Z-axis rod specs? I'd like to order a replacement.

One of my Z-axis threaded rods has a visible wobble at the bottom as it turns. I've tightened the z-axis related bolts, etc. per another thread but I'd prefer to simply order a replacement. Looked online and I have no clue what or how to measure for ordering. :lol:

Thanks!
 
#2
1/4"-16 ACME Rod from McMaster Carr. I never actually got confirmation on the -16 thread count, but it is what I got. They have a 36" length that you can cut in half.

My unit's rod has a bow in it from what I believe to be a previously discussed flaw in the design.