The torque spec for these mounting bolts shown next to the illustration on pg 2-19 in my service manual is 47 lbf-ft for the left step holder, no reason to think the right step holder would be any different. This torque value is obviously without the Tippi Bars, but I doubt that it would be any different with them. If you still have the mounting instructions for the bars, check to see if they specify the proper torque. If not, you may be able to contact the manufacturer by email or via their website to pose the question to them.
Also refer to post 3 in your
other thread on the subject.
Hope this helps.
Don B.