These are the correct washers with the threading lip so they will screw down and be retained onto the sump plug thread as per original MG specification.
Magnetic Oil Drain Plug, Stainless Steel Sump Drain Nut Bolt, Magnetic Oil Drain Plug with 5 Copper Crush Washer,Oil Drain Plug Universal for Most Cars Motorcycle (M12 x 1.5)
Magnetic Oil Drain Plug, Stainless Steel Sump Drain Nut Bolt, Magnetic Oil Drain Plug with 5 Copper Crush Washer,Oil Drain Plug Universal for Most Cars Motorcycle (M14 x 1.5)
M12 x 1.5 Magnetic Oil Drain Plug, Stainless Steel Sump Drain Nut Bolt, Magnetic Oil Drain Plug with 6 Copper Crush Washer,Oil Drain Plug Universal for Most Cars Motorcycle
LEONTOOL M12 x 1.5 Magnetic Oil Drain Plug Aluminum Sump Drain Nut Bolt with Red Copper Crush Washer Gaskets, Leak-proof Oil Pan Drain Plug Removal Tool Replacement Car Accessories for Most Vehicles
Magnetic Oil Drain Plug with Copper Crush Washer – M12 X 1.5 Stainless Steel Sump Drain Nut Bolt, Oil Plug Replacement, Magnetic Oil Drain for Cars Motorcycles –5 Washers, Universal Fit
BMW 3-Series E46 330i 2000 - 2006 M12 x 1.5 Black Magnetic Sump / Drain Plug