Fresh from a barn in Maine.  This is a O.E.M.. Harley Davidson 4 speed transmission main shaft for the 1966 thru 1969 transmissions.  This is part number 35039-65.  This will fit the 1966 thru 1969 FL, FLH and FX 4 speeds.  This is in good condition with only minor cleaning needed.  There are no issues with the shaft, and the indents on the key way are to hold the key in place during assembly.  The flats on the threaded end was from my wire brush during a quick clean up of the the keyway.  I will be uploading lots of N.O.S. Harley Davidson parts in the coming months, so be sure to keep checking back.  You can't beat brand new, unless it is N.O.S. Harley Davidson brand new.  Thank you for looking and please check my other listings for more N.O.S. and O.E.M. HARLEY parts.