Can I purchase the little screws to fasten the wire to the jaws of the DMT wire myograph?

Yes, you can. Please ask your local sales representative to quote for a "Set of twelve microscrews". Please note that with the purchase of a DMT wire myograph you will have received a set of five spare screws.
As of July 14 2017, ADInstruments no longer sells or supports any DMT products (unless previously purchased under tender contract). Instead, please contact DMT direct.