I recently mounted my Jab 3300 on my CH750. The mount uses 4 AN-6 bolts and 2 AN-4 bolts to secure it to the firewall. AN-363 (metal locknuts) are used. It's been my experience that metal locknuts require a little more "oomph" to wrench than do the usual fiber locknuts. Does this affect the torque values? I've looked at the FAA torque tables and they don't mention AN 363 nuts (or I missed it! LOL!). Also, different values are given for AN-364 and AN-365 nuts used in tension and shear. Looks like an engine mount is in both tension and shear?

Anyone know the correction or actual torque ranges for AN-4 and AN-6 bolts with AN-363 metal locknuts?


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I should add that Lock-Tite will act like a lubricant when torquing so torque to lubed specs. Less torque.



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