Jim, that is pretty much what we found also. We put the bolts in from the inside and that bracket had not gotten a knurled bolt previously so it was basically "cutting" new grooves for the new knurls. When John and I did our rigs last March I could have sworn that the new nuts were flanged friction nuts. they would screw on easily for about 4 threads then you had to use a wrench, like the Z-bracket bolts. That didn't seem to be the case this time... Dave
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