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Old 12-17-2016, 09:31 AM
bmw540san bmw540san is offline
Join Date: Jul 2014
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Originally Posted by oldskewel View Post
Probably class 10.9. The 0.9 vs. 0.8 means the yield stress is that amount (90% vs. 80%) of the ultimate tensile stress. So it's not just a little different. I'm sure 10.9 is what you got, since that is the higher strength standard. (8.8 is lower, 12.9 is higher still)
You're probably right. I know I've matched the original ones in terms of grade.
2003 BMW X5 4.6is
Supersprint Magnum Exhaust * 88C thermostat * Spal electric fan (fan clutch delete) * Bilstein HD struts and shocks with rear Suplex coil springs (air suspension delete) * OEM style 177 wheels
2003 BMW M5
1997 BMW 528i/A
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