Originally posted by Mcgyver
Even with the threads right up against each other, it shouldn't matter. You are still straining the fastener along the axis, except that the strain is localized to the root of the thread between the two nuts. I can believe that adding a washer makes it easier to implement, but I can't see why (either theoretically or based on experience) that it is neccessary.
Edit: LHC, if you do happen to break the stud at the casting, instead of drilling it out, consider using a torch. Cast iron won't burn like the steel so you can often carefully blow the steel out and leave the threads intact. I've done that several times after someone here told me about it.
Leave a comment: