I've read a few threads where people have had their caliper bolts loosen up on them or completely come out and cause major problems. While rebuilding my front end shortly after getting my truck, I discovered one of my caliper bolts was missing a washer and the other bolts weren't very tight. I remembered a pretty cool locking washer that I've read about quite a while ago and figured I'd try them out. They are two piece locking washers that require more torque to remove them than the torque you install them at. They will not loosen. I've had them on my truck for about 9 months now and they work. They are expensive but if you have any bolts that you don't want to work loose from vibration then these will do the job.
http://www.nord-lock.com/
This is the part number that I used for the caliper bolts. I measured the factory washers and these were pretty close. I believe these nord lock washers are slightly smaller outside diameter than the stock ones.
http://www.fastenal.com/web/products/detail.ex?sku=0129510
After their initial torquing they need to be re-torqued a little while later so the serrations on the washers bite onto the surfaces properly. After that they stay as tight as you set them until you break them loose.
http://www.nord-lock.com/
This is the part number that I used for the caliper bolts. I measured the factory washers and these were pretty close. I believe these nord lock washers are slightly smaller outside diameter than the stock ones.
http://www.fastenal.com/web/products/detail.ex?sku=0129510
After their initial torquing they need to be re-torqued a little while later so the serrations on the washers bite onto the surfaces properly. After that they stay as tight as you set them until you break them loose.
