Make up a V block jig to hold them properly and cut them with a band saw.
File the cut end true and back the nut off. Do not force the nut. If you can
find a proper die for the thread put that in place before cutting and use it
to clean the thread.



"Evan Gatehouse" wrote in message
news:4o9yi.73998$rX4.72949@pd7urf2no...
I've got to put in some new thru hulls and of course the stem length of
the fitting is about 3" long. The hull is ~3/4" thick, the portion that
sits in the seacock is perhaps 1" which leaves 1-1/4" or so to be made up
with backing pads. This is a bit excessive to me and probably dates back
to wooden boats with 2" thick planking!

Anybody ever cut their thru hull fitting before installing it? I'd leave
the nut on to chase the threads after cutting, and cut it with a hacksaw
or cut off wheel on an angle grinder.

Thanks,

Evan Gatehouse