Special bolts for springs?

Does anyone know the proper bolt length/diameter of the spring mounting bolts for a 75? Is there a special shoulder length? I seem to recall they use special locking nuts also, but my memory isn't the best. My jeep is up on the mountain, and I'm down in the big city, so I can't measure. I'd really like to pick up some bolts while I'm down here, with the price of gas and all...TIA

 

I don't have the size at hand, but there's nothing special about them, you don't even need grade 8's. Use nylocks or deformed nuts so you dont' have to torque them tight, this will let the suspension move.

There are gun drilled bolts with grease zerks available, but they can be $$$.

 

I'm pretty sure they are 7/16" bolts. I'd go for the grade 8 because the shackles rub on them. Gr.8 harder so will resist wear a little better. Like NorCoJeeper said, make sure they are long enough to put a self locking nut on so you don't have to torque them down to a point where the suspension can't move freely.

 

Thanks guys, grade 8 it is. A little more money at this point in the game is no big deal.