It is a screw whose thread conforms to the ISO metric screw thread profilewith a nominal diameter of 8 millimeters. This M8 screw is used to mount TVs that do no support universal wall brackets, they are mostly used in mounting Samsung TVs or any other brand of tv that require a threaded M8*45mm screw. allow +0.51mm 0r -0.51 mm marginal error on the lenght .the diameter is 8mm.
For wall mounting Samsung TVs that require M8x43mm. Meets ASTM, ISO, ANSI and DIN specs
Rated for TV mounting with zinc plating and coated with electrostatic discharge preventive