HERE WE HAVE 4 x 5/8" NYLOC NUTS, THESE FIT THE REAR OUTER FULCRUM SHAFTS AND 4 X  1/2" NYLOC NUTS, THESE FIT THE INNER FULCRUM SHAFTS ON E TYPE , MK10 , 420G , 420 , S TYPE , LIMO , XJ6 , XJ12 , [SER1 2 3 ] AND XJS,[1961-1986] NOT SUITABLE FOR XJ40 OR LATER