> My concern would be that most socket headed cap screws aren't very strong,
Alan, I'm not sure where you got this, but I disagree. The most common material
for SHCS is 180 kpsi steel, roughly 20% stronger than Grade 8 (150 kpsi) and 50%
stronger than Grade 5 (120 kpsi).
http://www.mcmaster.com/
> The socket of socket headed cap screws itself is the problem.
Recommended torques for SHCS pretty much mirror the tensile strength, and I've
never seen an undamaged head strip when used with the proper tool and torque.
What I don't understand is what advantage SHCS is supposed to have for
driveshaft flanges. I'm not sure there's even room to get a hex key in there,
but even if there is, how is that any better than a box end wrench on a hex head
? There still isn't room for a ratchet.
> I use grade 8, 3/8" NF and just installed all-metal locking nuts,
I prefer to buy the special bolts from TRF, as they have the right thread length
and shank diameter; but I agree with the all-metal locking nuts as I had the
same problem with Nylocs. Note that the all-metal nuts do wear the threads each
time they're installed/removed, so both bolts & nuts need to be replaced
occasionally (but not every time).
Randall
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