Bob is the only one that has it right about tightening the bolts. You dont need to torque them as all you will do is pull the light weight spring hangers into contacting the spring or bushing. That isnt the plan here at all. If the serrations are drawn into the hanger contacting it and the nut is contacting the hanger, snug it up. The nuts are the jam type so unless you screw them up or use old ones they should hold. I use locktite as a safety. The goal isnt to bind the hanger, bushing, and spring. The goal is to allow the bushing to rotate on the bolt so that you change out the bolt over time. If you keep the coach long enough you will change the bushing as well but nothing like the nylon cheapies. You dont want to bind or bend the light weight spring hangers. Having said that if you are a Gorilla then maybe you do need a torque wrench to avoid over snugging them.