These will fit most Rover / MG cars amongst many others but you should check dimensions shown below and in the image to ensure suitability for your particular car.
They have a separate ‘floating’ captive washer. The washers on these nuts are free to rotate – just like on the original manufacturers items.
Thread size: M12 x 1.5.
Taper angle: 60 Degrees.
Overall nut width: 28mm.
Overall nut height: 30mm (including the head & seat).
Internal thread length: 24mm.
Material: Heat Treated Carbon Alloy Steel.
Finish: Bright Zinc Plated.
Socket Size: 19mm.