This is the timing Side left hand thread mainshaft nut - Fits all SOHC engines.
These nuts follow the original pattern - being a shouldered, left hand nut. It is manufactured in high tensile steel, and as this is no longer easy to obtain, we mill the hex to the correct Imperial Hex, as per original.
Price is Each
Final photograph shows the nut fitted to end of crankshaft in the bevel chamber - where it retains the main bevel gear and oil pump drive gear. FYI - it is often difficult to see clearly in the confined space of the bevel chamber - and it is tightening this nut, and shimming behind the bevel gear that will give you the final mesh of the bevel gears (in conjunction with the vertical bevel) - as a hint, you may find it easier to assemble these parts 'dry' when shimming - as it is much easier to hear any 'clicking' of the gears when backlash is present. You can email us if you require any more information on this assembly process - it is one of the more dificult, but necessary assembly tasks on this engine type.