leaf spring torque

Factory used what is sometimes referred to as, "scored" nut on their U-bolts. 2 very small square indentions on the outside are created with so much pressure that the threads inside are distorted. These nuts are not going to loosen. In fact without heat applied you may not get them off without twisting/degrading their U-bolt. What is correct for your aftermarket parts,,, Ask that mfgr would be best.