> I bought some from TRF & Moss and they both sent grade 5 nuts that were
> IDENTICAL, right down to the manufacturer's marks to the nuts I found at
> Fastenal. The only difference was I was able to purchase 100 at Fastenal
> ($8.94) for only slightly more than the SHIPPING costs for 14 from Moss
> @ $1.20 ea. or TRF @ $1.10 ea.
Did you run a thread gage through them all, to be sure they were
manufactured to the same tolerances ?
Having the same manufacturer's marks really doesn't tell you anything except
who made them.
I've been told that the head nuts for the TRactor motor have a different
thread clearance standard than ordinary hardware store nuts, but I don't
know that for a fact. However, I'm pretty sure that the original head nuts
for both engines were no stronger than Grade 5, certainly not as strong as
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