need some .375 course locknuts. due to extreme costs of fuel, and of
items in stores lately, I don't feel like paying the $6.32 EACH involved
costs would be to procure three. already have plenty .375 NC nuts
sitting around here doing nothing anyway.

approaches:

A. one hacksaw-cut nut parallel with bolt long axis, squeeze in vice.

B. same as above, torch red to heat, squeeze in vice, no hacksaw cut

C. squeeze in vice, no red heat AND no cut, 'just do it'

D. 'peen' the carriage bolt threads some, no locknut needed

E. already tried this: use a metric nut on a NC-threaded bolt, and hope
for a interference fit: unfortunately, the old VW engine mounting nuts I
have seem to be very nearly -precisely- the exact thread size as 3/8 NC
threaded carriage bolt thread :-(

F. heat bolt near-red, apply some 'braze' to the threads...

other faster simpler cheaper approaches welcome

thanks,

toolie :-)