the second thread 42 is a u215c u2033 16 thread the width and thickness of the flat base 44 are u00be u2033 and u215b u2033 respectively in operation the internally threaded fastener 11 which is a machine rut or a wing nut is screwed onto the second thread 42 of the mounting bracket 10 fig9 a fig9 b fig9 c and fig9 d illustrate a top view a bottom view a side view and cross sectional view of the fastener 11 respectively the flat base 44 is inserted into the accessory adapter shoe on the top of the camera by screwing down the fastener 11 the mounting bracket 10 is secured to the camera by sliding the mounting bracket 10 along the slot 14 on the adjustment bracket 09 the camera 39 s lens is horizontally adjusted for a most appropriate position after the lens 39 horizontal position is determined the mounting bracket 10 can be secured to the adjustment bracket 09 by screwing down the internally threaded fastener 13 which can be a machine nut or a wing nut fig8 a fig8 b fig8 c and fig8 d illustrate respectively a top view a bottom view a side view and cross sectional view of a machine nut 13 used as a fastener referring to fig1 fig4 fig5 and.