If it is the same thread as in camera it is NOT 1/4 UNC but 1/4 BSW (i.e. Whitworth thread, see http://en.wikipedia....ndard_Whitworth
). The difference is the thread angle which in UNC and metric threads is 60° but in BSW is 55°. If you put a 1/4 UNC screw into the camera you quite
probable ruin the thread at least partially.