I want to determine the screw thread on the rod which is supplied
by Wilmad to insert their vortex plugs into 5 mm tubes. This does
not appear to be a metric size, and is probably a US
standard rather than European. Anyone know the size? My reason for
wanting this info is not to manufacture my own rods, but rather that
I want to buy, or even make, nylon (or similar) screws which can be used to
fill the hole in plugs whilst we use them to contain liquid crystalline
samples. So, even better would be to know whether nylon screws of the
same size can be bought in the US.
Jim Emsley
e-mail: jwe@soton.ac.uk