piston marking

[F3600]

Hi im tearing down my KA24E for a small rebuild and i found these mark on the piston anyone can tell me what they tell? maybe there some kind of chart on the net to read these... well thanx for any help !

[F3600]

i have found in my fsm that the "2" is for the grade of the piston and there are five grade with different measurement spec.. the other numbers are not explained ...

no one have an idea?

[F3600]

here the spec for all piston grade number for KA24E piston... should be helpfull for someone somedays!