Quote:
I would suggest that URO do the same test that I just did. I think they will find that the mount cannot accept the alldata spec quoted. Then redesign with a high strength steel. In other words use mechanical engineering, not Amazon returns 
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I forgot to mention that I also did a test on the old mount. No problem tightening to 22 ft.lb. No stripping. Shows that the problem is with the steel used for the URO mount.
I have now drilled and tapped the new URO mount to 3/8-16. Looking at recommended torques for the lowest quality low carbon steel, it looks like I should use about 12ft lb or 144 in-lb. And be careful applying it!
URO are sending me a replacement. If I use it, I will keep torque really low. For Grade 2 bolts, the recommended torque is just 8ft.lb. Or 13ft.lb for Grade 5. Not sure I even had that when first one stripped.
URO really need to do some research on this. Most people will either just tighten by hand to some unknown torque, or use the spec of 22ft.lb and end up with stripped threads.
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Graham
85 300D
,72 350SL, 98 E320, Outback 2.5