Thread Size:M12x1.5, 12 x 1.5 12x1.5. Specifications: M12x1.5, 12 x 1.5 12x1.5 - ET style lug nut - 60 degree cone seat - 3/4", 19mm. Style:ET Acorn. Seat Type:ET Conical 60 Degree. Lug nuts have two compatibilities, one to match the lug nut thread size to the vehicle's wheel studs and the other to match the lug nut style to the wheel.