The odd thing about the screws I'm trying to replace is that the pitch of each
thread is the same as for a normal wood screw, making the double pitch pretty
fine. But you're right, I am going to try an industrial fastener store in town.
-----Original Message-----
From: ext dms@scheidt.chem.nd.edu [mailto:dms@scheidt.chem.nd.edu]
It's called a "double start" or twin start thread. they are used where
speed of assembly is more important than the absolute strenght of the
clamping action. An industrial supply place may bew a betteer bet.
Incidently, I've got a C clamp that's threaded like this, and it's really
handy for things where you really want a third hand. I've no idea where it
came from, though.
David
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