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.
M17 x 1.5 Oil Pan Sump Drain Plug Repair Kit for M16 x 1.5 round head
Oil Pan Sump Drain Plug Repair Kit for M12 X1.5 M14 x 1.5 M16 X1.5
Oil Sump Drain Plug Sealing Washer x 2 Febi 31118 For Alfa 159 Brera Giulietta
M13x1.5 Oil Pan Sump Drain Plug Repair Kit for M12 x 1.5
FEBI 30269 OIL SUMP DRAIN PLUG M14 x 1.5 WITH SEAL 17MM HEX SUZUKI HYUNDAI A4836
US PRO Tools 20 Piece 3/8 DR Drain Sump Plug Key Set, Keys Oil Din 3298
