CAMSHAFT SPROCKET AND EARLY ALTERNATOR CRANK SHAFT NUT

CAMSHAFT SPROCKET AND EARLY ALTERNATOR CRANK SHAFT NUT

THERE ARE THREE TYPES OF CAMSHAFT SPROCKET NUTS USED ON THE HEAVY TWINS, THIS IS THE EARLIER ONE 5/8" X 20 TPI 15/16" (24MM) AF 3/8" (9.5MM) LONG OF WHICH 1/16" (1.6MM) IS A TURNED CIRCULAR PORTION ACTING AS A WASHER. THIS NUT WOULD BE USED ON ALL TWINS FROM THE EARLIEST THROUGH TO 1971 UNLESS A REV COUNTER WAS USED IN WHICH CASE THE NUT IS 067684 (FITS THE SAME BUT HAS A SLOT TO DRIVE THE REV COUNTER GEARBOX) WHEN THE POINTS WERE MOVED TO THE END OF THE CAMSHAFT IN 1971.  THE NUT CHANGED TO PART NUMBER 067774.  

INCIDENTALLY D12/942 ALSO FITS EARLY ALTERNATOR TYPE CRANKSHAFTS THAT DO NOT REQUIRE A SLEEVE NUT AND THE GEARBOX MAINSHAFT (CLUTCH END).
DOMINATORS THAT REQUIRE A SLEEVE NUT WOULD USE PART NUMBER 24947 AND COMMANDO WOULD USE PART NUMBER 060387.