Bought some new magnum 500 center caps and on tightening the 1st bolt it sheared off in the bore. These aftermarket ones are a real step down from my originals I had on and off a few times over the years. The thread bore is a 1/4" less than the old caps and doesn't have the locator pins. Yet the 3/4" length bolts they supplied are the same length as the old ones. From what I've measured, the margin for bottoming the bolt is about none. Having worked in a machine shop drilling and tapping holes much less the endless bolting/unbolting I've done I was surprised this happened. So drilled out the bolt and rethreaded and going to use 5/8" bolts. See what happens now...I guess ya can't expect a lot for a 100 bucks anymore.