Morgan didn’t even fit two of the dreadful things, a choice that can only introduce some interesting twisting forces as one spring is effectively a solid rod, while the other does it's best to do what comes naturally.
I asked a retired metallurgist pal about the failed bolt. He said:
"The failure of your HT bolt looks suspiciously like fatigue with crack initiation at the thread roots which form a significant stress raiser. A suspension component such as an anti-tramp bar is bound to be subjected to cyclic loads, which in this case will be in predominantly in shear, and a bolt having a hardness/tensile strength at a level where a conventional HSS drill makes little impression on it would not be expected to have much ductility. Was the bolt zinc-plated for corrosion resistance? If it was, then hydrogen embrittlement could well be a contributory factor".![[Linked Image]](https://www.tm-img.com/images/2025/11/03/Sheared-bolt-close-up.jpg)
