Not sure about the hole but the stud size is M12 X 1.25
18mm
8mm
M12 signifies that the shank is 12 mm diameter. The length will vary. +++ Another tip: The A/F size of a standard M12 bolt or nut is 19mm, so close to 3/4" that the latter spanner will work - but be aware that this is the only co-incidence between metric and inch-based fastenings; and the M-series proportions don't follow a very consistent path!
M12 x 1.25 x 40
size is M12 x 1,5 dont know the length of the bolt though
You drill the proper size hole in to the bolt and remove it with an E-Z Out.
it is the same size of the bolt same as the hole and thread. the higher the grade of the bolt the more touque you can apply.
If you want the bolt to slide through the hole a 5/16 hole will work well.
M12 1.5mm
M12-1.50
M12-1.50