Internal Drive Wheel Nut Specification Conical nuts with a 60° taper these are both extremely strong and thin compared to most nuts. The internal drive makes it impossible to scratch your wheels with a socket like a conventional nut. Choose M12x1.25 for Nissan and M12x1.5 for Subaru Toyota Lexus Honda Mazda Mitsubishi and Ford. Dimensions: Overall height : 37 mm Taper height : 4 mm External diameter : 20 mm Sold per pack of 20 + free internal drive key supplied.