These M4 x 12mm long Thumb Screws are for most monitor mounting VESA standard plates that are 100mm x 100mm or 75mm x 75mm in size pattern. Great for quickly removing video monitors from any monitor mounting system.
The .187″ thick monitor plate yields a 7.25mm long screw. Standard screw length is 7.4mm / .291″. Use a minimum thread engagement of 1-1/2 times the screw diameter on the threaded insert on the display. O-Rings are also included with this set of 4 thumb screws to accommodate monitor mounts that have a counter bored hole at the mounting side with screw holes not bigger than .201″/5.1mm
Warning: Max hole size on the VESA plate where these thumb screws can be used is .201″ . If hole is larger head can pull off Knob and through hole. If holes on your VESA plate is larger, Do Not Use