What is the Torque Spec Rating for 9/16 Inch Diameter Shackle Bolts

Updated 07/30/2018 | Published 07/28/2018

Question:

What are the torque specs for the 9/16 mounting bolts?

asked by: Joseph

Expert Reply:

There is not a specific torque spec for shackle bolts including the ones in the Tandem-Axle Trailer Hanger Kit part # APT3. They need to be secure but if they are too tight then the leaf springs will bind and cause problems in your trailer's suspension. The lock nuts included with the kit will ensure the bolts do not fall out. I recommend tightening the nuts until they makes contact with the shackle strap and then add another 1/4 turn. This should give you the right amount of torque needed to secure the nut and prevent the suspension components from binding.

expert reply by: Conner L